161281680935 has 32 divisors (see below), whose sum is σ = 203519796480. Its totient is φ = 122581555200.

The previous prime is 161281680919. The next prime is 161281680949. The reversal of 161281680935 is 539086182161.

It is not a de Polignac number, because 161281680935 - 2⁴ = 161281680919 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1114025 + ... + 1250445.

It is an arithmetic number, because the mean of its divisors is an integer number (6359993640).

Almost surely, 2^161281680935 is an apocalyptic number.

161281680935 is a deficient number, since it is larger than the sum of its proper divisors (42238115545).

161281680935 is a wasteful number, since it uses less digits than its factorization.

161281680935 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136619.

The product of its (nonzero) digits is 622080, while the sum is 50.

The spelling of 161281680935 in words is "one hundred sixty-one billion, two hundred eighty-one million, six hundred eighty thousand, nine hundred thirty-five".