64040698354680 has 128 divisors (see below), whose sum is σ = 213795901915200. Its totient is φ = 17051366969856.

The previous prime is 64040698354609. The next prime is 64040698354691. The reversal of 64040698354680 is 8645389604046.

64040698354680 is a `hidden beast` number, since 6 + 4 + 0 + 4 + 0 + 6 + 9 + 8 + 3 + 546 + 80 = 666.

It is a super-2 number, since 2×64040698354680² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44698239 + ... + 46108718.

Almost surely, 2^{64040698354680} is an apocalyptic number.

64040698354680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64040698354680 is an abundant number, since it is smaller than the sum of its proper divisors (149755203560520).

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

64040698354680 is a wasteful number, since it uses less digits than its factorization.

64040698354680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90807630 (or 90807620 counting only the distinct ones).

The product of its (nonzero) digits is 119439360, while the sum is 63.

The spelling of 64040698354680 in words is "sixty-four trillion, forty billion, six hundred ninety-eight million, three hundred fifty-four thousand, six hundred eighty".