64723540913136 has 300 divisors, whose sum is σ = 225427230852120. Its totient is φ = 17854769399040.

The previous prime is 64723540913069. The next prime is 64723540913147. The reversal of 64723540913136 is 63131904532746.

64723540913136 is a `hidden beast` number, since 6 + 4 + 7 + 2 + 3 + 540 + 91 + 3 + 1 + 3 + 6 = 666.

64723540913136 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 15730870 + ... + 19414101.

Almost surely, 2^{64723540913136} is an apocalyptic number.

It is an amenable number.

64723540913136 is an abundant number, since it is smaller than the sum of its proper divisors (160703689938984).

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

64723540913136 is a wasteful number, since it uses less digits than its factorization.

64723540913136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35145034 (or 35145012 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 54.

The spelling of 64723540913136 in words is "sixty-four trillion, seven hundred twenty-three billion, five hundred forty million, nine hundred thirteen thousand, one hundred thirty-six".