79661147542 has 16 divisors (see below), whose sum is σ = 125852320512. Its totient is φ = 37742743720.

The previous prime is 79661147539. The next prime is 79661147543. The reversal of 79661147542 is 24574116697.

It is a self number, because there is not a number n which added to its sum of digits gives 79661147542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79661147543) 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, 8087434 + ... + 8097277.

It is an arithmetic number, because the mean of its divisors is an integer number (7865770032).

Almost surely, 2^79661147542 is an apocalyptic number.

79661147542 is a deficient number, since it is larger than the sum of its proper divisors (46191172970).

79661147542 is a wasteful number, since it uses less digits than its factorization.

79661147542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16184843.

The product of its digits is 2540160, while the sum is 52.

The spelling of 79661147542 in words is "seventy-nine billion, six hundred sixty-one million, one hundred forty-seven thousand, five hundred forty-two".