161493496 has 8 divisors (see below), whose sum is σ = 302800320. Its totient is φ = 80746744.

The previous prime is 161493487. The next prime is 161493499. The reversal of 161493496 is 694394161.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161493499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10093336 + ... + 10093351.

It is an arithmetic number, because the mean of its divisors is an integer number (37850040).

Almost surely, 2^161493496 is an apocalyptic number.

It is an amenable number.

161493496 is a deficient number, since it is larger than the sum of its proper divisors (141306824).

161493496 is a wasteful number, since it uses less digits than its factorization.

161493496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20186693 (or 20186689 counting only the distinct ones).

The product of its digits is 139968, while the sum is 43.

The square root of 161493496 is about 12708.0091281050. The cubic root of 161493496 is about 544.5674496229.

The spelling of 161493496 in words is "one hundred sixty-one million, four hundred ninety-three thousand, four hundred ninety-six".