64578251376 has 40 divisors (see below), whose sum is σ = 185363500560. Its totient is φ = 21526083648.

The previous prime is 64578251329. The next prime is 64578251377. The reversal of 64578251376 is 67315287546.

64578251376 is a `hidden beast` number, since 6 + 4 + 57 + 8 + 2 + 513 + 76 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64578251377) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 74742915 + ... + 74743778.

It is an arithmetic number, because the mean of its divisors is an integer number (4634087514).

Almost surely, 2^64578251376 is an apocalyptic number.

It is an amenable number.

64578251376 is an abundant number, since it is smaller than the sum of its proper divisors (120785249184).

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

64578251376 is a wasteful number, since it uses less digits than its factorization.

64578251376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149486710 (or 149486698 counting only the distinct ones).

The product of its digits is 8467200, while the sum is 54.

The spelling of 64578251376 in words is "sixty-four billion, five hundred seventy-eight million, two hundred fifty-one thousand, three hundred seventy-six".