161857307463 has 8 divisors (see below), whose sum is σ = 219347608176. Its totient is φ = 106135939200.

The previous prime is 161857307449. The next prime is 161857307471. The reversal of 161857307463 is 364703758161.

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

It is not a de Polignac number, because 161857307463 - 2²⁵ = 161823753031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161857307413) 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, 442232898 + ... + 442233263.

It is an arithmetic number, because the mean of its divisors is an integer number (27418451022).

Almost surely, 2^161857307463 is an apocalyptic number.

161857307463 is a deficient number, since it is larger than the sum of its proper divisors (57490300713).

161857307463 is an equidigital number, since it uses as much as digits as its factorization.

161857307463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884466225.

The product of its (nonzero) digits is 2540160, while the sum is 51.

The spelling of 161857307463 in words is "one hundred sixty-one billion, eight hundred fifty-seven million, three hundred seven thousand, four hundred sixty-three".