551685389854 has 16 divisors (see below), whose sum is σ = 886845611808. Its totient is φ = 256718464992.

The previous prime is 551685389839. The next prime is 551685389951. The reversal of 551685389854 is 458983586155.

It is a super-2 number, since 2×551685389854² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 551685389854.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162068037 + ... + 162071440.

It is an arithmetic number, because the mean of its divisors is an integer number (55427850738).

Almost surely, 2^551685389854 is an apocalyptic number.

551685389854 is a deficient number, since it is larger than the sum of its proper divisors (335160221954).

551685389854 is a wasteful number, since it uses less digits than its factorization.

551685389854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324139539.

The product of its digits is 207360000, while the sum is 67.

The spelling of 551685389854 in words is "five hundred fifty-one billion, six hundred eighty-five million, three hundred eighty-nine thousand, eight hundred fifty-four".