161914885454 has 16 divisors (see below), whose sum is σ = 277630759008. Its totient is φ = 69376497792.

The previous prime is 161914885411. The next prime is 161914885469. The reversal of 161914885454 is 454588419161.

It is a super-2 number, since 2×161914885454² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161914885454.

It is a congruent number.

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, 1235039 + ... + 1359834.

It is an arithmetic number, because the mean of its divisors is an integer number (17351922438).

Almost surely, 2^161914885454 is an apocalyptic number.

161914885454 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

161914885454 is a deficient number, since it is larger than the sum of its proper divisors (115715873554).

161914885454 is a wasteful number, since it uses less digits than its factorization.

161914885454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2599339.

The product of its digits is 5529600, while the sum is 56.

The spelling of 161914885454 in words is "one hundred sixty-one billion, nine hundred fourteen million, eight hundred eighty-five thousand, four hundred fifty-four".