78797190111 has 4 divisors (see below), whose sum is σ = 105062920152. Its totient is φ = 52531460072.

The previous prime is 78797190107. The next prime is 78797190113. The reversal of 78797190111 is 11109179787.

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

It is a cyclic number.

It is not a de Polignac number, because 78797190111 - 2² = 78797190107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78797190113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13132865016 + ... + 13132865021.

It is an arithmetic number, because the mean of its divisors is an integer number (26265730038).

Almost surely, 2^78797190111 is an apocalyptic number.

78797190111 is a deficient number, since it is larger than the sum of its proper divisors (26265730041).

78797190111 is a wasteful number, since it uses less digits than its factorization.

78797190111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26265730040.

The product of its (nonzero) digits is 222264, while the sum is 51.

The spelling of 78797190111 in words is "seventy-eight billion, seven hundred ninety-seven million, one hundred ninety thousand, one hundred eleven".