64154255625 has 30 divisors (see below), whose sum is σ = 115797015906. Its totient is φ = 34215600000.

The previous prime is 64154255617. The next prime is 64154255629. The reversal of 64154255625 is 52655245146.

64154255625 is a `hidden beast` number, since 6 + 4 + 15 + 4 + 2 + 5 + 5 + 625 = 666.

64154255625 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 5 ways, for example, as 46771415289 + 17382840336 = 216267^2 + 131844^2 .

It is not a de Polignac number, because 64154255625 - 2³ = 64154255617 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64154255629) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 5696976 + ... + 5708225.

Almost surely, 2^64154255625 is an apocalyptic number.

It is an amenable number.

64154255625 is a deficient number, since it is larger than the sum of its proper divisors (51642760281).

64154255625 is a wasteful number, since it uses less digits than its factorization.

64154255625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11405227 (or 11405209 counting only the distinct ones).

The product of its digits is 1440000, while the sum is 45.

The spelling of 64154255625 in words is "sixty-four billion, one hundred fifty-four million, two hundred fifty-five thousand, six hundred twenty-five".