64006447956 has 24 divisors (see below), whose sum is σ = 162925504224. Its totient is φ = 19395893280.

The previous prime is 64006447951. The next prime is 64006447969. The reversal of 64006447956 is 65974460046.

It is a junction number, because it is equal to n+sod(n) for n = 64006447899 and 64006447908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64006447951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 242448535 + ... + 242448798.

It is an arithmetic number, because the mean of its divisors is an integer number (6788562676).

Almost surely, 2^64006447956 is an apocalyptic number.

64006447956 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

64006447956 is an abundant number, since it is smaller than the sum of its proper divisors (98919056268).

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

64006447956 is a wasteful number, since it uses less digits than its factorization.

64006447956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484897351 (or 484897349 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 51.

The spelling of 64006447956 in words is "sixty-four billion, six million, four hundred forty-seven thousand, nine hundred fifty-six".