161392293405 has 48 divisors (see below), whose sum is σ = 333610917120. Its totient is φ = 70571533824.

The previous prime is 161392293367. The next prime is 161392293421. The reversal of 161392293405 is 504392293161.

161392293405 is a `hidden beast` number, since 1 + 6 + 13 + 9 + 229 + 3 + 405 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-161392293405 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, 11130940 + ... + 11145429.

It is an arithmetic number, because the mean of its divisors is an integer number (6950227440).

Almost surely, 2^161392293405 is an apocalyptic number.

161392293405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161392293405 is an abundant number, since it is smaller than the sum of its proper divisors (172218623715).

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

161392293405 is a wasteful number, since it uses less digits than its factorization.

161392293405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22276410 (or 22276407 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The spelling of 161392293405 in words is "one hundred sixty-one billion, three hundred ninety-two million, two hundred ninety-three thousand, four hundred five".