64124640556 has 12 divisors (see below), whose sum is σ = 112220053792. Its totient is φ = 32061768048.

The previous prime is 64124640553. The next prime is 64124640607. The reversal of 64124640556 is 65504642146.

64124640556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×64124640556² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (64124640551) 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, 235546 + ... + 428638.

Almost surely, 2^64124640556 is an apocalyptic number.

It is an amenable number.

64124640556 is a deficient number, since it is larger than the sum of its proper divisors (48095413236).

64124640556 is a wasteful number, since it uses less digits than its factorization.

64124640556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276120 (or 276118 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 43.

The spelling of 64124640556 in words is "sixty-four billion, one hundred twenty-four million, six hundred forty thousand, five hundred fifty-six".