78946597121 has 16 divisors (see below), whose sum is σ = 94982885760. Its totient is φ = 64100574720.

The previous prime is 78946597091. The next prime is 78946597153. The reversal of 78946597121 is 12179564987.

It is a de Polignac number, because none of the positive numbers 2^k-78946597121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78946597421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1657775 + ... + 1704731.

It is an arithmetic number, because the mean of its divisors is an integer number (5936430360).

Almost surely, 2^78946597121 is an apocalyptic number.

It is an amenable number.

78946597121 is a deficient number, since it is larger than the sum of its proper divisors (16036288639).

78946597121 is a wasteful number, since it uses less digits than its factorization.

78946597121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59624.

The product of its digits is 7620480, while the sum is 59.

The spelling of 78946597121 in words is "seventy-eight billion, nine hundred forty-six million, five hundred ninety-seven thousand, one hundred twenty-one".