51520415505 has 32 divisors (see below), whose sum is σ = 90023996160. Its totient is φ = 25006652160.

The previous prime is 51520415503. The next prime is 51520415539. The reversal of 51520415505 is 50551402515.

It is not a de Polignac number, because 51520415505 - 2¹ = 51520415503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51520415503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1846770 + ... + 1874459.

It is an arithmetic number, because the mean of its divisors is an integer number (2813249880).

Almost surely, 2^51520415505 is an apocalyptic number.

It is an amenable number.

51520415505 is a deficient number, since it is larger than the sum of its proper divisors (38503580655).

51520415505 is a wasteful number, since it uses less digits than its factorization.

51520415505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3721321.

The product of its (nonzero) digits is 25000, while the sum is 33.

The spelling of 51520415505 in words is "fifty-one billion, five hundred twenty million, four hundred fifteen thousand, five hundred five".