64156425 has 12 divisors (see below), whose sum is σ = 106072080. Its totient is φ = 34216720.

The previous prime is 64156357. The next prime is 64156441. The reversal of 64156425 is 52465146.

It is not a de Polignac number, because 64156425 - 2¹⁶ = 64090889 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 427635 + ... + 427784.

It is an arithmetic number, because the mean of its divisors is an integer number (8839340).

Almost surely, 2^64156425 is an apocalyptic number.

It is an amenable number.

64156425 is a deficient number, since it is larger than the sum of its proper divisors (41915655).

64156425 is a wasteful number, since it uses less digits than its factorization.

64156425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855432 (or 855427 counting only the distinct ones).

The product of its digits is 28800, while the sum is 33.

The square root of 64156425 is about 8009.7705959659. The cubic root of 64156425 is about 400.3256202733.

The spelling of 64156425 in words is "sixty-four million, one hundred fifty-six thousand, four hundred twenty-five".