64256929830 has 48 divisors (see below), whose sum is σ = 173255728464. Its totient is φ = 17135180640.

The previous prime is 64256929813. The next prime is 64256929879. The reversal of 64256929830 is 3892965246.

It is a happy number.

64256929830 is a `hidden beast` number, since 6 + 42 + 569 + 2 + 9 + 8 + 30 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13219161 + ... + 13224020.

It is an arithmetic number, because the mean of its divisors is an integer number (3609494343).

Almost surely, 2^64256929830 is an apocalyptic number.

64256929830 is an abundant number, since it is smaller than the sum of its proper divisors (108998798634).

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

64256929830 is a wasteful number, since it uses less digits than its factorization.

64256929830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26443203 (or 26443191 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 54.

The spelling of 64256929830 in words is "sixty-four billion, two hundred fifty-six million, nine hundred twenty-nine thousand, eight hundred thirty".