691827941376 has 1120 divisors, whose sum is σ = 2541712618368. Its totient is φ = 184520540160.

The previous prime is 691827941341. The next prime is 691827941407. The reversal of 691827941376 is 673149728196.

691827941376 is a `hidden beast` number, since 6 + 9 + 1 + 82 + 79 + 413 + 76 = 666.

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, 2182422370 + ... + 2182422686.

Almost surely, 2^691827941376 is an apocalyptic number.

691827941376 is a gapful number since it is divisible by the number (66) 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 691827941376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1270856309184).

691827941376 is an abundant number, since it is smaller than the sum of its proper divisors (1849884676992).

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

691827941376 is a wasteful number, since it uses less digits than its factorization.

691827941376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402 (or 369 counting only the distinct ones).

The product of its digits is 27433728, while the sum is 63.

The spelling of 691827941376 in words is "six hundred ninety-one billion, eight hundred twenty-seven million, nine hundred forty-one thousand, three hundred seventy-six".