79800049102 has 4 divisors (see below), whose sum is σ = 119700073656. Its totient is φ = 39900024550.

The previous prime is 79800049079. The next prime is 79800049111. The reversal of 79800049102 is 20194000897.

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

It is a super-2 number, since 2×79800049102² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19950012274 + ... + 19950012277.

It is an arithmetic number, because the mean of its divisors is an integer number (29925018414).

Almost surely, 2^79800049102 is an apocalyptic number.

79800049102 is a deficient number, since it is larger than the sum of its proper divisors (39900024554).

79800049102 is a wasteful number, since it uses less digits than its factorization.

79800049102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39900024553.

The product of its (nonzero) digits is 36288, while the sum is 40.

Adding to 79800049102 its reverse (20194000897), we get a palindrome (99994049999).

The spelling of 79800049102 in words is "seventy-nine billion, eight hundred million, forty-nine thousand, one hundred two".