551642161223 has 4 divisors (see below), whose sum is σ = 555155805720. Its totient is φ = 548128516728.

The previous prime is 551642161211. The next prime is 551642161289. The reversal of 551642161223 is 322161246155.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 551642161223 - 2⁶ = 551642161159 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 (551642166223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1756822013 + ... + 1756822326.

It is an arithmetic number, because the mean of its divisors is an integer number (138788951430).

Almost surely, 2^551642161223 is an apocalyptic number.

551642161223 is a deficient number, since it is larger than the sum of its proper divisors (3513644497).

551642161223 is a wasteful number, since it uses less digits than its factorization.

551642161223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3513644496.

The product of its digits is 86400, while the sum is 38.

The spelling of 551642161223 in words is "five hundred fifty-one billion, six hundred forty-two million, one hundred sixty-one thousand, two hundred twenty-three".