64526621268 has 48 divisors (see below), whose sum is σ = 160635714624. Its totient is φ = 20089105920.

The previous prime is 64526621249. The next prime is 64526621309. The reversal of 64526621268 is 86212662546.

It is a happy number.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1180555 + ... + 1234002.

It is an arithmetic number, because the mean of its divisors is an integer number (3346577388).

Almost surely, 2^64526621268 is an apocalyptic number.

64526621268 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

64526621268 is an abundant number, since it is smaller than the sum of its proper divisors (96109093356).

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

64526621268 is a wasteful number, since it uses less digits than its factorization.

64526621268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2414712 (or 2414710 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 48.

The spelling of 64526621268 in words is "sixty-four billion, five hundred twenty-six million, six hundred twenty-one thousand, two hundred sixty-eight".