64993962240 has 108 divisors (see below), whose sum is σ = 224872379004. Its totient is φ = 17331720192.

The previous prime is 64993962223. The next prime is 64993962259. The reversal of 64993962240 is 4226939946.

64993962240 is a `hidden beast` number, since 6 + 4 + 9 + 9 + 3 + 9 + 622 + 4 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 32990183424 + 32003778816 = 181632^2 + 178896^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2809399 + ... + 2832438.

Almost surely, 2^64993962240 is an apocalyptic number.

64993962240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64993962240 is an abundant number, since it is smaller than the sum of its proper divisors (159878416764).

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

64993962240 is a wasteful number, since it uses less digits than its factorization.

64993962240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5641864 (or 5641847 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 54.

The spelling of 64993962240 in words is "sixty-four billion, nine hundred ninety-three million, nine hundred sixty-two thousand, two hundred forty".