161490541564 has 24 divisors (see below), whose sum is σ = 308314199088. Its totient is φ = 73401440640.

The previous prime is 161490541561. The next prime is 161490541573. The reversal of 161490541564 is 465145094161.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161490541561) 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, 1069354 + ... + 1210990.

It is an arithmetic number, because the mean of its divisors is an integer number (12846424962).

Almost surely, 2^161490541564 is an apocalyptic number.

It is an amenable number.

161490541564 is a deficient number, since it is larger than the sum of its proper divisors (146823657524).

161490541564 is a wasteful number, since it uses less digits than its factorization.

161490541564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167565 (or 167563 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 46.

The spelling of 161490541564 in words is "one hundred sixty-one billion, four hundred ninety million, five hundred forty-one thousand, five hundred sixty-four".