51509308075 has 48 divisors (see below), whose sum is σ = 66163908096. Its totient is φ = 39757910400.

The previous prime is 51509308069. The next prime is 51509308091. The reversal of 51509308075 is 57080390515.

It is not a de Polignac number, because 51509308075 - 2⁵ = 51509308043 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25088749 + ... + 25090801.

It is an arithmetic number, because the mean of its divisors is an integer number (1378414752).

Almost surely, 2^51509308075 is an apocalyptic number.

51509308075 is a deficient number, since it is larger than the sum of its proper divisors (14654600021).

51509308075 is a wasteful number, since it uses less digits than its factorization.

51509308075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2404 (or 2399 counting only the distinct ones).

The product of its (nonzero) digits is 189000, while the sum is 43.

The spelling of 51509308075 in words is "fifty-one billion, five hundred nine million, three hundred eight thousand, seventy-five".