51100101660506 has 4 divisors (see below), whose sum is σ = 76650152490762. Its totient is φ = 25550050830252.

The previous prime is 51100101660463. The next prime is 51100101660523. The reversal of 51100101660506 is 60506610100115.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 42914408726281 + 8185692934225 = 6550909^2 + 2861065^2 .

It is a super-2 number, since 2×51100101660506² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12775025415125 + ... + 12775025415128.

Almost surely, 2^{51100101660506} is an apocalyptic number.

51100101660506 is a deficient number, since it is larger than the sum of its proper divisors (25550050830256).

51100101660506 is a wasteful number, since it uses less digits than its factorization.

51100101660506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25550050830255.

The product of its (nonzero) digits is 5400, while the sum is 32.

The spelling of 51100101660506 in words is "fifty-one trillion, one hundred billion, one hundred one million, six hundred sixty thousand, five hundred six".