161494669468 has 24 divisors (see below), whose sum is σ = 308350949760. Its totient is φ = 73396443120.

The previous prime is 161494669451. The next prime is 161494669481. The reversal of 161494669468 is 864966494161.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68473 + ... + 572431.

It is an arithmetic number, because the mean of its divisors is an integer number (12847956240).

Almost surely, 2^161494669468 is an apocalyptic number.

It is an amenable number.

161494669468 is a deficient number, since it is larger than the sum of its proper divisors (146856280292).

161494669468 is a wasteful number, since it uses less digits than its factorization.

161494669468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511257 (or 511255 counting only the distinct ones).

The product of its digits is 53747712, while the sum is 64.

The spelling of 161494669468 in words is "one hundred sixty-one billion, four hundred ninety-four million, six hundred sixty-nine thousand, four hundred sixty-eight".