64725380178 has 16 divisors (see below), whose sum is σ = 131644841760. Its totient is φ = 21209446496.

The previous prime is 64725380173. The next prime is 64725380189. The reversal of 64725380178 is 87108352746.

It is a self number, because there is not a number n which added to its sum of digits gives 64725380178.

It is not an unprimeable number, because it can be changed into a prime (64725380171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91419675 + ... + 91420382.

It is an arithmetic number, because the mean of its divisors is an integer number (8227802610).

Almost surely, 2^64725380178 is an apocalyptic number.

64725380178 is an abundant number, since it is smaller than the sum of its proper divisors (66919461582).

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

64725380178 is a wasteful number, since it uses less digits than its factorization.

64725380178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182840121.

The product of its (nonzero) digits is 2257920, while the sum is 51.

The spelling of 64725380178 in words is "sixty-four billion, seven hundred twenty-five million, three hundred eighty thousand, one hundred seventy-eight".