51010555505 has 48 divisors (see below), whose sum is σ = 77443735824. Its totient is φ = 31968115200.

The previous prime is 51010555499. The next prime is 51010555511. The reversal of 51010555505 is 50555501015.

It is an interprime number because it is at equal distance from previous prime (51010555499) and next prime (51010555511).

It can be written as a sum of positive squares in 8 ways, for example, as 7259721616 + 43750833889 = 85204^2 + 209167^2 .

It is not a de Polignac number, because 51010555505 - 2²⁶ = 50943446641 is a prime.

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, 242399 + ... + 400971.

It is an arithmetic number, because the mean of its divisors is an integer number (1613411163).

Almost surely, 2^51010555505 is an apocalyptic number.

It is an amenable number.

51010555505 is a deficient number, since it is larger than the sum of its proper divisors (26433180319).

51010555505 is a wasteful number, since it uses less digits than its factorization.

51010555505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158706 (or 158699 counting only the distinct ones).

The product of its (nonzero) digits is 15625, while the sum is 32.

The spelling of 51010555505 in words is "fifty-one billion, ten million, five hundred fifty-five thousand, five hundred five".