64427520570 has 128 divisors (see below), whose sum is σ = 180734754816. Its totient is φ = 14392256256.

The previous prime is 64427520551. The next prime is 64427520611. The reversal of 64427520570 is 7502572446.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7467279 + ... + 7475901.

It is an arithmetic number, because the mean of its divisors is an integer number (1411990272).

Almost surely, 2^64427520570 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64427520570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90367377408).

64427520570 is an abundant number, since it is smaller than the sum of its proper divisors (116307234246).

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

64427520570 is a wasteful number, since it uses less digits than its factorization.

64427520570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9444.

The product of its (nonzero) digits is 470400, while the sum is 42.

The spelling of 64427520570 in words is "sixty-four billion, four hundred twenty-seven million, five hundred twenty thousand, five hundred seventy".