79154388202 has 4 divisors (see below), whose sum is σ = 118731582306. Its totient is φ = 39577194100.

The previous prime is 79154388163. The next prime is 79154388217. The reversal of 79154388202 is 20288345197.

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

It can be written as a sum of positive squares in only one way, i.e., 40522092601 + 38632295601 = 201301^2 + 196551^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19788597049 + ... + 19788597052.

Almost surely, 2^79154388202 is an apocalyptic number.

79154388202 is a deficient number, since it is larger than the sum of its proper divisors (39577194104).

79154388202 is a wasteful number, since it uses less digits than its factorization.

79154388202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39577194103.

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 79154388202 in words is "seventy-nine billion, one hundred fifty-four million, three hundred eighty-eight thousand, two hundred two".