161432583507 has 24 divisors (see below), whose sum is σ = 252780408608. Its totient is φ = 98685216000.

The previous prime is 161432583503. The next prime is 161432583509. The reversal of 161432583507 is 705385234161.

It is a happy number.

161432583507 is a `hidden beast` number, since 1 + 6 + 1 + 43 + 25 + 83 + 507 = 666.

161432583507 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161432583507 - 2² = 161432583503 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 (161432583503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4551094 + ... + 4586427.

Almost surely, 2^161432583507 is an apocalyptic number.

161432583507 is a deficient number, since it is larger than the sum of its proper divisors (91347825101).

161432583507 is a wasteful number, since it uses less digits than its factorization.

161432583507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9137691 (or 9137688 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The spelling of 161432583507 in words is "one hundred sixty-one billion, four hundred thirty-two million, five hundred eighty-three thousand, five hundred seven".