51561051054 has 16 divisors (see below), whose sum is σ = 103133953920. Its totient is φ = 17185041720.

The previous prime is 51561051053. The next prime is 51561051083. The reversal of 51561051054 is 45015016515.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51561051053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 436762 + ... + 542109.

It is an arithmetic number, because the mean of its divisors is an integer number (6445872120).

Almost surely, 2^51561051054 is an apocalyptic number.

51561051054 is an abundant number, since it is smaller than the sum of its proper divisors (51572902866).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51561051054 is a wasteful number, since it uses less digits than its factorization.

51561051054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987655.

The product of its (nonzero) digits is 15000, while the sum is 33.

Adding to 51561051054 its reverse (45015016515), we get a palindrome (96576067569).

The spelling of 51561051054 in words is "fifty-one billion, five hundred sixty-one million, fifty-one thousand, fifty-four".