64515428544 has 112 divisors (see below), whose sum is σ = 195139462400. Its totient is φ = 18427585536.

The previous prime is 64515428543. The next prime is 64515428573. The reversal of 64515428544 is 44582451546.

It is a tau number, because it is divible by the number of its divisors (112).

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

It is a junction number, because it is equal to n+sod(n) for n = 64515428493 and 64515428502.

It is not an unprimeable number, because it can be changed into a prime (64515428543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7883847 + ... + 7892025.

Almost surely, 2^64515428544 is an apocalyptic number.

64515428544 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

64515428544 is an abundant number, since it is smaller than the sum of its proper divisors (130624033856).

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

64515428544 is a wasteful number, since it uses less digits than its factorization.

64515428544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14070 (or 14060 counting only the distinct ones).

The product of its digits is 3072000, while the sum is 48.

The spelling of 64515428544 in words is "sixty-four billion, five hundred fifteen million, four hundred twenty-eight thousand, five hundred forty-four".