163621220046615 has 48 divisors (see below), whose sum is σ = 291301700403168. Its totient is φ = 84898437251328.

The previous prime is 163621220046607. The next prime is 163621220046643. The reversal of 163621220046615 is 516640022126361.

163621220046615 is a `hidden beast` number, since 1 + 6 + 3 + 6 + 2 + 1 + 2 + 20 + 0 + 4 + 6 + 615 = 666.

It is not a de Polignac number, because 163621220046615 - 2³ = 163621220046607 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13904029 + ... + 22815881.

It is an arithmetic number, because the mean of its divisors is an integer number (6068785425066).

Almost surely, 2^{163621220046615} is an apocalyptic number.

163621220046615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

163621220046615 is a deficient number, since it is larger than the sum of its proper divisors (127680480356553).

163621220046615 is a wasteful number, since it uses less digits than its factorization.

163621220046615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8922928 (or 8922925 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The spelling of 163621220046615 in words is "one hundred sixty-three trillion, six hundred twenty-one billion, two hundred twenty million, forty-six thousand, six hundred fifteen".