64306519536 has 320 divisors, whose sum is σ = 209522589696. Its totient is φ = 16590182400.

The previous prime is 64306519499. The next prime is 64306519553. The reversal of 64306519536 is 63591560346.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9819015 + ... + 9825561.

Almost surely, 2^64306519536 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 64306519536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104761294848).

64306519536 is an abundant number, since it is smaller than the sum of its proper divisors (145216070160).

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

64306519536 is a wasteful number, since it uses less digits than its factorization.

64306519536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6660 (or 6654 counting only the distinct ones).

The product of its (nonzero) digits is 1749600, while the sum is 48.

The spelling of 64306519536 in words is "sixty-four billion, three hundred six million, five hundred nineteen thousand, five hundred thirty-six".