64526031536 has 80 divisors (see below), whose sum is σ = 133869431808. Its totient is φ = 30058828800.

The previous prime is 64526031523. The next prime is 64526031541. The reversal of 64526031536 is 63513062546.

It is a junction number, because it is equal to n+sod(n) for n = 64526031493 and 64526031502.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3640616 + ... + 3658296.

Almost surely, 2^64526031536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64526031536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66934715904).

64526031536 is an abundant number, since it is smaller than the sum of its proper divisors (69343400272).

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

64526031536 is a wasteful number, since it uses less digits than its factorization.

64526031536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17970 (or 17964 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 41.

The spelling of 64526031536 in words is "sixty-four billion, five hundred twenty-six million, thirty-one thousand, five hundred thirty-six".