551220730767 has 96 divisors (see below), whose sum is σ = 985218124800. Its totient is φ = 301124355840.

The previous prime is 551220730763. The next prime is 551220730769. The reversal of 551220730767 is 767037022155.

551220730767 is a `hidden beast` number, since 5 + 512 + 2 + 0 + 73 + 0 + 7 + 67 = 666.

It is not a de Polignac number, because 551220730767 - 2² = 551220730763 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551220730763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 119283717 + ... + 119288337.

It is an arithmetic number, because the mean of its divisors is an integer number (10262688800).

Almost surely, 2^551220730767 is an apocalyptic number.

551220730767 is a deficient number, since it is larger than the sum of its proper divisors (433997394033).

551220730767 is a wasteful number, since it uses less digits than its factorization.

551220730767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7715 (or 7703 counting only the distinct ones).

The product of its (nonzero) digits is 617400, while the sum is 45.

The spelling of 551220730767 in words is "five hundred fifty-one billion, two hundred twenty million, seven hundred thirty thousand, seven hundred sixty-seven".