64625415870 has 64 divisors (see below), whose sum is σ = 162097334784. Its totient is φ = 16458414720.

The previous prime is 64625415859. The next prime is 64625415887. The reversal of 64625415870 is 7851452646.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 370840 + ... + 516500.

It is an arithmetic number, because the mean of its divisors is an integer number (2532770856).

Almost surely, 2^64625415870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64625415870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81048667392).

64625415870 is an abundant number, since it is smaller than the sum of its proper divisors (97471918914).

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

64625415870 is a wasteful number, since it uses less digits than its factorization.

64625415870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146337.

The product of its (nonzero) digits is 1612800, while the sum is 48.

The spelling of 64625415870 in words is "sixty-four billion, six hundred twenty-five million, four hundred fifteen thousand, eight hundred seventy".