64266653256 has 128 divisors (see below), whose sum is σ = 183633246720. Its totient is φ = 18567512064.

The previous prime is 64266653219. The next prime is 64266653261. The reversal of 64266653256 is 65235666246.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 64266653199 and 64266653208.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2282641 + ... + 2310623.

It is an arithmetic number, because the mean of its divisors is an integer number (1434634740).

Almost surely, 2^64266653256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64266653256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91816623360).

64266653256 is an abundant number, since it is smaller than the sum of its proper divisors (119366593464).

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

64266653256 is a wasteful number, since it uses less digits than its factorization.

64266653256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28455 (or 28451 counting only the distinct ones).

The product of its digits is 9331200, while the sum is 51.

The spelling of 64266653256 in words is "sixty-four billion, two hundred sixty-six million, six hundred fifty-three thousand, two hundred fifty-six".