51106557501 has 16 divisors (see below), whose sum is σ = 76996699200. Its totient is φ = 33493562064.

The previous prime is 51106557449. The next prime is 51106557511. The reversal of 51106557501 is 10575560115.

It is a happy number.

51106557501 is a `hidden beast` number, since 51 + 1 + 0 + 6 + 557 + 50 + 1 = 666.

It is not a de Polignac number, because 51106557501 - 2¹⁰ = 51106556477 is a prime.

It is a super-2 number, since 2×51106557501² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51106557511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16039386 + ... + 16042571.

It is an arithmetic number, because the mean of its divisors is an integer number (4812293700).

Almost surely, 2^51106557501 is an apocalyptic number.

It is an amenable number.

51106557501 is a deficient number, since it is larger than the sum of its proper divisors (25890141699).

51106557501 is a wasteful number, since it uses less digits than its factorization.

51106557501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32082025 (or 32082019 counting only the distinct ones).

The product of its (nonzero) digits is 26250, while the sum is 36.

The spelling of 51106557501 in words is "fifty-one billion, one hundred six million, five hundred fifty-seven thousand, five hundred one".