163961323974 has 24 divisors (see below), whose sum is σ = 405999469200. Its totient is φ = 46846092528.

The previous prime is 163961323961. The next prime is 163961324017. The reversal of 163961323974 is 479323169361.

163961323974 is a `hidden beast` number, since 1 + 6 + 396 + 13 + 239 + 7 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 163961323974.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 650640049 + ... + 650640300.

It is an arithmetic number, because the mean of its divisors is an integer number (16916644550).

Almost surely, 2^163961323974 is an apocalyptic number.

163961323974 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

163961323974 is an abundant number, since it is smaller than the sum of its proper divisors (242038145226).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

163961323974 is a wasteful number, since it uses less digits than its factorization.

163961323974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1301280364 (or 1301280361 counting only the distinct ones).

The product of its digits is 4408992, while the sum is 54.

The spelling of 163961323974 in words is "one hundred sixty-three billion, nine hundred sixty-one million, three hundred twenty-three thousand, nine hundred seventy-four".