51125161575545 has 16 divisors (see below), whose sum is σ = 62140371834240. Its totient is φ = 40374153790464.

The previous prime is 51125161575473. The next prime is 51125161575611. The reversal of 51125161575545 is 54557516152115.

It is a cyclic number.

It is not a de Polignac number, because 51125161575545 - 2³² = 51120866608249 is a prime.

It is a super-2 number, since 2×51125161575545² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50108405 + ... + 51118514.

It is an arithmetic number, because the mean of its divisors is an integer number (3883773239640).

Almost surely, 2^{51125161575545} is an apocalyptic number.

It is an amenable number.

51125161575545 is a deficient number, since it is larger than the sum of its proper divisors (11015210258695).

51125161575545 is a wasteful number, since it uses less digits than its factorization.

51125161575545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101228224.

The product of its digits is 5250000, while the sum is 53.

The spelling of 51125161575545 in words is "fifty-one trillion, one hundred twenty-five billion, one hundred sixty-one million, five hundred seventy-five thousand, five hundred forty-five".