64135563540 has 24 divisors (see below), whose sum is σ = 179579578080. Its totient is φ = 17102816928.

The previous prime is 64135563509. The next prime is 64135563559. The reversal of 64135563540 is 4536553146.

64135563540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×64135563540² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64135563492 and 64135563501.

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, 534462970 + ... + 534463089.

It is an arithmetic number, because the mean of its divisors is an integer number (7482482420).

Almost surely, 2^64135563540 is an apocalyptic number.

64135563540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64135563540 is an abundant number, since it is smaller than the sum of its proper divisors (115444014540).

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

64135563540 is a wasteful number, since it uses less digits than its factorization.

64135563540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068926071 (or 1068926069 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 42.

The spelling of 64135563540 in words is "sixty-four billion, one hundred thirty-five million, five hundred sixty-three thousand, five hundred forty".