11787779494 has 16 divisors (see below), whose sum is σ = 17850903840. Its totient is φ = 5837520960.

The previous prime is 11787779477. The next prime is 11787779513. The reversal of 11787779494 is 49497778711.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 634599 + ... + 652909.

It is an arithmetic number, because the mean of its divisors is an integer number (1115681490).

Almost surely, 2^11787779494 is an apocalyptic number.

11787779494 is a deficient number, since it is larger than the sum of its proper divisors (6063124346).

11787779494 is a wasteful number, since it uses less digits than its factorization.

11787779494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21375.

The product of its digits is 24893568, while the sum is 64.

The spelling of 11787779494 in words is "eleven billion, seven hundred eighty-seven million, seven hundred seventy-nine thousand, four hundred ninety-four".