64425804157 has 32 divisors (see below), whose sum is σ = 80036490240. Its totient is φ = 51043392000.

The previous prime is 64425804139. The next prime is 64425804169. The reversal of 64425804157 is 75140852446.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64425804157 is a prime.

It is a super-2 number, since 2×64425804157² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64425804127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4519 + ... + 358987.

It is an arithmetic number, because the mean of its divisors is an integer number (2501140320).

Almost surely, 2^64425804157 is an apocalyptic number.

It is an amenable number.

64425804157 is a deficient number, since it is larger than the sum of its proper divisors (15610686083).

64425804157 is a wasteful number, since it uses less digits than its factorization.

64425804157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354565.

The product of its (nonzero) digits is 1075200, while the sum is 46.

The spelling of 64425804157 in words is "sixty-four billion, four hundred twenty-five million, eight hundred four thousand, one hundred fifty-seven".