51005010000561 has 32 divisors (see below), whose sum is σ = 68373738309888. Its totient is φ = 33820429044480.

The previous prime is 51005010000551. The next prime is 51005010000587. The reversal of 51005010000561 is 16500001050015.

It is not a de Polignac number, because 51005010000561 - 2⁷ = 51005010000433 is a prime.

It is a super-2 number, since 2×51005010000561² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51005010000551) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 621918220 + ... + 622000226.

It is an arithmetic number, because the mean of its divisors is an integer number (2136679322184).

Almost surely, 2^{51005010000561} is an apocalyptic number.

It is an amenable number.

51005010000561 is a deficient number, since it is larger than the sum of its proper divisors (17368728309327).

51005010000561 is a wasteful number, since it uses less digits than its factorization.

51005010000561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83881.

The product of its (nonzero) digits is 750, while the sum is 24.

Adding to 51005010000561 its reverse (16500001050015), we get a palindrome (67505011050576).

The spelling of 51005010000561 in words is "fifty-one trillion, five billion, ten million, five hundred sixty-one", and thus it is an aban number.