551640504663 has 12 divisors (see below), whose sum is σ = 797813839368. Its totient is φ = 367298900880.

The previous prime is 551640504637. The next prime is 551640504671. The reversal of 551640504663 is 366405046155.

551640504663 is a `hidden beast` number, since 5 + 516 + 40 + 50 + 46 + 6 + 3 = 666.

It is not a de Polignac number, because 551640504663 - 2⁵ = 551640504631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551640504263) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38445393 + ... + 38459738.

It is an arithmetic number, because the mean of its divisors is an integer number (66484486614).

Almost surely, 2^551640504663 is an apocalyptic number.

551640504663 is a deficient number, since it is larger than the sum of its proper divisors (246173334705).

551640504663 is a wasteful number, since it uses less digits than its factorization.

551640504663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76905934 (or 76905931 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 45.

The spelling of 551640504663 in words is "five hundred fifty-one billion, six hundred forty million, five hundred four thousand, six hundred sixty-three".