691112298240 has 1728 divisors, whose sum is σ = 3085583155200. Its totient is φ = 138900013056.

The previous prime is 691112298223. The next prime is 691112298257. The reversal of 691112298240 is 42892211196.

It is a happy number.

691112298240 is a `hidden beast` number, since 6 + 9 + 1 + 112 + 298 + 240 = 666.

It is an interprime number because it is at equal distance from previous prime (691112298223) and next prime (691112298257).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 3860962471 + ... + 3860962649.

It is an arithmetic number, because the mean of its divisors is an integer number (1785638400).

Almost surely, 2^691112298240 is an apocalyptic number.

691112298240 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 691112298240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1542791577600).

691112298240 is an abundant number, since it is smaller than the sum of its proper divisors (2394470856960).

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

691112298240 is a wasteful number, since it uses less digits than its factorization.

691112298240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382 (or 365 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The spelling of 691112298240 in words is "six hundred ninety-one billion, one hundred twelve million, two hundred ninety-eight thousand, two hundred forty".