64166525505654 has 64 divisors (see below), whose sum is σ = 151534223850240. Its totient is φ = 17857568373120.

The previous prime is 64166525505569. The next prime is 64166525505721. The reversal of 64166525505654 is 45650552566146.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 189643564 + ... + 189981615.

It is an arithmetic number, because the mean of its divisors is an integer number (2367722247660).

Almost surely, 2^{64166525505654} is an apocalyptic number.

64166525505654 is an abundant number, since it is smaller than the sum of its proper divisors (87367698344586).

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

64166525505654 is a wasteful number, since it uses less digits than its factorization.

64166525505654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379625405.

The product of its (nonzero) digits is 129600000, while the sum is 60.

The spelling of 64166525505654 in words is "sixty-four trillion, one hundred sixty-six billion, five hundred twenty-five million, five hundred five thousand, six hundred fifty-four".