551894785871 has 16 divisors (see below), whose sum is σ = 651211280160. Its totient is φ = 461106069120.

The previous prime is 551894785853. The next prime is 551894785877. The reversal of 551894785871 is 178587498155.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 551894785871 - 2³⁰ = 550821044047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551894785877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8393900 + ... + 8459393.

It is an arithmetic number, because the mean of its divisors is an integer number (40700705010).

Almost surely, 2^551894785871 is an apocalyptic number.

551894785871 is a deficient number, since it is larger than the sum of its proper divisors (99316494289).

551894785871 is a wasteful number, since it uses less digits than its factorization.

551894785871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16853546.

The product of its digits is 112896000, while the sum is 68.

The spelling of 551894785871 in words is "five hundred fifty-one billion, eight hundred ninety-four million, seven hundred eighty-five thousand, eight hundred seventy-one".