64486007668178 has 16 divisors (see below), whose sum is σ = 96790298626680. Its totient is φ = 32222577600000.

The previous prime is 64486007668171. The next prime is 64486007668207. The reversal of 64486007668178 is 87186670068446.

It can be written as a sum of positive squares in 4 ways, for example, as 55364864733049 + 9121142935129 = 7440757^2 + 3020123^2 .

It is not an unprimeable number, because it can be changed into a prime (64486007668171) 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, 45731678 + ... + 47120678.

Almost surely, 2^{64486007668178} is an apocalyptic number.

64486007668178 is a deficient number, since it is larger than the sum of its proper divisors (32304290958502).

64486007668178 is a wasteful number, since it uses less digits than its factorization.

64486007668178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1403693.

The product of its (nonzero) digits is 520224768, while the sum is 71.

The spelling of 64486007668178 in words is "sixty-four trillion, four hundred eighty-six billion, seven million, six hundred sixty-eight thousand, one hundred seventy-eight".