51505601166501 has 16 divisors (see below), whose sum is σ = 71786764124160. Its totient is φ = 32808794531760.

The previous prime is 51505601166497. The next prime is 51505601166541. The reversal of 51505601166501 is 10566110650515.

It is not a de Polignac number, because 51505601166501 - 2² = 51505601166497 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51505601166541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3505205745 + ... + 3505220438.

It is an arithmetic number, because the mean of its divisors is an integer number (4486672757760).

Almost surely, 2^{51505601166501} is an apocalyptic number.

It is an amenable number.

51505601166501 is a deficient number, since it is larger than the sum of its proper divisors (20281162957659).

51505601166501 is a wasteful number, since it uses less digits than its factorization.

51505601166501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7010426296.

The product of its (nonzero) digits is 135000, while the sum is 42.

The spelling of 51505601166501 in words is "fifty-one trillion, five hundred five billion, six hundred one million, one hundred sixty-six thousand, five hundred one".