161436796816 has 40 divisors (see below), whose sum is σ = 320262180480. Its totient is φ = 78790889856.

The previous prime is 161436796799. The next prime is 161436796819. The reversal of 161436796816 is 618697634161.

It is a Smith number, since the sum of its digits (58) 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 (161436796819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1014990 + ... + 1163218.

It is an arithmetic number, because the mean of its divisors is an integer number (8006554512).

Almost surely, 2^161436796816 is an apocalyptic number.

161436796816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161436796816 is a deficient number, since it is larger than the sum of its proper divisors (158825383664).

161436796816 is a wasteful number, since it uses less digits than its factorization.

161436796816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149863 (or 149857 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 58.

The spelling of 161436796816 in words is "one hundred sixty-one billion, four hundred thirty-six million, seven hundred ninety-six thousand, eight hundred sixteen".