163961386154 has 16 divisors (see below), whose sum is σ = 248717476800. Its totient is φ = 81058045440.

The previous prime is 163961386139. The next prime is 163961386177. The reversal of 163961386154 is 451683169361.

It is a super-2 number, since 2×163961386154² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 163961386096 and 163961386105.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 488804 + ... + 752895.

It is an arithmetic number, because the mean of its divisors is an integer number (15544842300).

Almost surely, 2^163961386154 is an apocalyptic number.

163961386154 is a deficient number, since it is larger than the sum of its proper divisors (84756090646).

163961386154 is a wasteful number, since it uses less digits than its factorization.

163961386154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1242445.

The product of its digits is 2799360, while the sum is 53.

The spelling of 163961386154 in words is "one hundred sixty-three billion, nine hundred sixty-one million, three hundred eighty-six thousand, one hundred fifty-four".