551320503345 has 72 divisors (see below), whose sum is σ = 989210262456. Its totient is φ = 284021760000.

The previous prime is 551320503323. The next prime is 551320503401. The reversal of 551320503345 is 543305023155.

551320503345 is a `hidden beast` number, since 5 + 513 + 20 + 50 + 33 + 45 = 666.

It can be written as a sum of positive squares in 12 ways, for example, as 129766373361 + 421554129984 = 360231^2 + 649272^2 .

It is not a de Polignac number, because 551320503345 - 2²⁰ = 551319454769 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 7604065 + ... + 7676225.

It is an arithmetic number, because the mean of its divisors is an integer number (13739031423).

Almost surely, 2^551320503345 is an apocalyptic number.

It is an amenable number.

551320503345 is a deficient number, since it is larger than the sum of its proper divisors (437889759111).

551320503345 is a wasteful number, since it uses less digits than its factorization.

551320503345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72355 (or 72311 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 36.

The spelling of 551320503345 in words is "five hundred fifty-one billion, three hundred twenty million, five hundred three thousand, three hundred forty-five".