161494726738 has 8 divisors (see below), whose sum is σ = 242244533232. Its totient is φ = 80746548996.

The previous prime is 161494726733. The next prime is 161494726747. The reversal of 161494726738 is 837627494161.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (161494726733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118320 + ... + 580507.

It is an arithmetic number, because the mean of its divisors is an integer number (30280566654).

Almost surely, 2^161494726738 is an apocalyptic number.

161494726738 is a deficient number, since it is larger than the sum of its proper divisors (80749806494).

161494726738 is a wasteful number, since it uses less digits than its factorization.

161494726738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814376.

The product of its digits is 12192768, while the sum is 58.

The spelling of 161494726738 in words is "one hundred sixty-one billion, four hundred ninety-four million, seven hundred twenty-six thousand, seven hundred thirty-eight".