64137851540 has 24 divisors (see below), whose sum is σ = 153930844032. Its totient is φ = 21990120480.

The previous prime is 64137851507. The next prime is 64137851587. The reversal of 64137851540 is 4515873146.

It is a super-2 number, since 2×64137851540² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64137851491 and 64137851500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 229063616 + ... + 229063895.

It is an arithmetic number, because the mean of its divisors is an integer number (6413785168).

Almost surely, 2^64137851540 is an apocalyptic number.

It is an amenable number.

64137851540 is an abundant number, since it is smaller than the sum of its proper divisors (89792992492).

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

64137851540 is a wasteful number, since it uses less digits than its factorization.

64137851540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458127527 (or 458127525 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 44.

The spelling of 64137851540 in words is "sixty-four billion, one hundred thirty-seven million, eight hundred fifty-one thousand, five hundred forty".