551143157865 has 16 divisors (see below), whose sum is σ = 883131622848. Its totient is φ = 293508827456.

The previous prime is 551143157813. The next prime is 551143157897. The reversal of 551143157865 is 568751341155.

It is a cyclic number.

It is not a de Polignac number, because 551143157865 - 2¹³ = 551143149673 is a prime.

It is a super-2 number, since 2×551143157865² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27126387 + ... + 27146696.

It is an arithmetic number, because the mean of its divisors is an integer number (55195726428).

Almost surely, 2^551143157865 is an apocalyptic number.

It is an amenable number.

551143157865 is a deficient number, since it is larger than the sum of its proper divisors (331988464983).

551143157865 is a wasteful number, since it uses less digits than its factorization.

551143157865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54273768.

The product of its digits is 2520000, while the sum is 51.

The spelling of 551143157865 in words is "five hundred fifty-one billion, one hundred forty-three million, one hundred fifty-seven thousand, eight hundred sixty-five".