51945555115 has 16 divisors (see below), whose sum is σ = 65926437120. Its totient is φ = 39182663520.

The previous prime is 51945555049. The next prime is 51945555121. The reversal of 51945555115 is 51155554915.

It is not a de Polignac number, because 51945555115 - 2¹¹ = 51945553067 is a prime.

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, 1275679 + ... + 1315768.

It is an arithmetic number, because the mean of its divisors is an integer number (4120402320).

Almost surely, 2^51945555115 is an apocalyptic number.

51945555115 is a deficient number, since it is larger than the sum of its proper divisors (13980882005).

51945555115 is a wasteful number, since it uses less digits than its factorization.

51945555115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2591682.

The product of its digits is 562500, while the sum is 46.

The spelling of 51945555115 in words is "fifty-one billion, nine hundred forty-five million, five hundred fifty-five thousand, one hundred fifteen".