161293457015 has 4 divisors (see below), whose sum is σ = 193552148424. Its totient is φ = 129034765608.

The previous prime is 161293456997. The next prime is 161293457053. The reversal of 161293457015 is 510754392161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 161293457015 - 2¹⁰ = 161293455991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16129345697 + ... + 16129345706.

It is an arithmetic number, because the mean of its divisors is an integer number (48388037106).

Almost surely, 2^161293457015 is an apocalyptic number.

161293457015 is a deficient number, since it is larger than the sum of its proper divisors (32258691409).

161293457015 is an equidigital number, since it uses as much as digits as its factorization.

161293457015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32258691408.

The product of its (nonzero) digits is 226800, while the sum is 44.

The spelling of 161293457015 in words is "one hundred sixty-one billion, two hundred ninety-three million, four hundred fifty-seven thousand, fifteen".