556894191 has 16 divisors (see below), whose sum is σ = 854225408. Its totient is φ = 316116000.

The previous prime is 556894183. The next prime is 556894213. The reversal of 556894191 is 191498655.

It is not a de Polignac number, because 556894191 - 2³ = 556894183 is a prime.

It is a super-2 number, since 2×556894191² = 620262279939088962, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 556894191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556894181) 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, 84640 + ... + 90981.

It is an arithmetic number, because the mean of its divisors is an integer number (53389088).

Almost surely, 2^556894191 is an apocalyptic number.

556894191 is a deficient number, since it is larger than the sum of its proper divisors (297331217).

556894191 is a wasteful number, since it uses less digits than its factorization.

556894191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175782.

The product of its digits is 388800, while the sum is 48.

The square root of 556894191 is about 23598.6057003375. The cubic root of 556894191 is about 822.7304336136.

The spelling of 556894191 in words is "five hundred fifty-six million, eight hundred ninety-four thousand, one hundred ninety-one".