78496157161 has 4 divisors (see below), whose sum is σ = 80321649232. Its totient is φ = 76670665092.

The previous prime is 78496157147. The next prime is 78496157171. The reversal of 78496157161 is 16175169487.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78496157161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78496157171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 912745971 + ... + 912746056.

It is an arithmetic number, because the mean of its divisors is an integer number (20080412308).

Almost surely, 2^78496157161 is an apocalyptic number.

It is an amenable number.

78496157161 is a deficient number, since it is larger than the sum of its proper divisors (1825492071).

78496157161 is a wasteful number, since it uses less digits than its factorization.

78496157161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1825492070.

The product of its digits is 2540160, while the sum is 55.

The spelling of 78496157161 in words is "seventy-eight billion, four hundred ninety-six million, one hundred fifty-seven thousand, one hundred sixty-one".