655163919 has 12 divisors (see below), whose sum is σ = 951106000. Its totient is φ = 434579904.

The previous prime is 655163893. The next prime is 655163933. The reversal of 655163919 is 919361556.

655163919 is a `hidden beast` number, since 6 + 5 + 5 + 1 + 639 + 1 + 9 = 666.

It is not a de Polignac number, because 655163919 - 2⁷ = 655163791 is a prime.

It is a super-2 number, since 2×655163919² = 858479521518877122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655163819) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 181114 + ... + 184695.

Almost surely, 2^655163919 is an apocalyptic number.

655163919 is a deficient number, since it is larger than the sum of its proper divisors (295942081).

655163919 is a wasteful number, since it uses less digits than its factorization.

655163919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366014 (or 366011 counting only the distinct ones).

The product of its digits is 218700, while the sum is 45.

The square root of 655163919 is about 25596.1700064678. The cubic root of 655163919 is about 868.5270001340.

The spelling of 655163919 in words is "six hundred fifty-five million, one hundred sixty-three thousand, nine hundred nineteen".