64150608251 has 4 divisors (see below), whose sum is σ = 65884408512. Its totient is φ = 62416807992.

The previous prime is 64150608241. The next prime is 64150608253. The reversal of 64150608251 is 15280605146.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15280605146 = 2 ⋅7640302573.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64150608251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64150608253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 866900075 + ... + 866900148.

It is an arithmetic number, because the mean of its divisors is an integer number (16471102128).

Almost surely, 2^64150608251 is an apocalyptic number.

64150608251 is a deficient number, since it is larger than the sum of its proper divisors (1733800261).

64150608251 is a wasteful number, since it uses less digits than its factorization.

64150608251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1733800260.

The product of its (nonzero) digits is 57600, while the sum is 38.

The spelling of 64150608251 in words is "sixty-four billion, one hundred fifty million, six hundred eight thousand, two hundred fifty-one".