691712148960 has 480 divisors, whose sum is σ = 2791974854592. Its totient is φ = 157988413440.

The previous prime is 691712148917. The next prime is 691712148983. The reversal of 691712148960 is 69841217196.

691712148960 is a `hidden beast` number, since 6 + 91 + 7 + 12 + 1 + 489 + 60 = 666.

It is a tau number, because it is divible by the number of its divisors (480).

It is a super-2 number, since 2×691712148960² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 691712148897 and 691712148906.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 201487404 + ... + 201490836.

Almost surely, 2^691712148960 is an apocalyptic number.

691712148960 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 691712148960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1395987427296).

691712148960 is an abundant number, since it is smaller than the sum of its proper divisors (2100262705632).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

691712148960 is a wasteful number, since it uses less digits than its factorization.

691712148960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5688 (or 5671 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The spelling of 691712148960 in words is "six hundred ninety-one billion, seven hundred twelve million, one hundred forty-eight thousand, nine hundred sixty".