51520071505 has 64 divisors (see below), whose sum is σ = 73246440960. Its totient is φ = 34052659200.

The previous prime is 51520071467. The next prime is 51520071523. The reversal of 51520071505 is 50517002515.

It is not a de Polignac number, because 51520071505 - 2⁹ = 51520070993 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 111756975 + ... + 111757435.

It is an arithmetic number, because the mean of its divisors is an integer number (1144475640).

Almost surely, 2^51520071505 is an apocalyptic number.

It is an amenable number.

51520071505 is a deficient number, since it is larger than the sum of its proper divisors (21726369455).

51520071505 is a wasteful number, since it uses less digits than its factorization.

51520071505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130.

The product of its (nonzero) digits is 8750, while the sum is 31.

The spelling of 51520071505 in words is "fifty-one billion, five hundred twenty million, seventy-one thousand, five hundred five".