161212930659 has 24 divisors (see below), whose sum is σ = 260228417904. Its totient is φ = 95321760000.

The previous prime is 161212930651. The next prime is 161212930661. The reversal of 161212930659 is 956039212161.

161212930659 is a `hidden beast` number, since 1 + 612 + 1 + 29 + 3 + 0 + 6 + 5 + 9 = 666.

It is not a de Polignac number, because 161212930659 - 2³ = 161212930651 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (161212930651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19854642 + ... + 19862759.

It is an arithmetic number, because the mean of its divisors is an integer number (10842850746).

Almost surely, 2^161212930659 is an apocalyptic number.

161212930659 is a deficient number, since it is larger than the sum of its proper divisors (99015487245).

161212930659 is a wasteful number, since it uses less digits than its factorization.

161212930659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39717459 (or 39717456 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The spelling of 161212930659 in words is "one hundred sixty-one billion, two hundred twelve million, nine hundred thirty thousand, six hundred fifty-nine".