11878109997 has 32 divisors (see below), whose sum is σ = 17294256000. Its totient is φ = 7207729152.

The previous prime is 11878109993. The next prime is 11878110011. The reversal of 11878109997 is 79990187811.

It is not a de Polignac number, because 11878109997 - 2² = 11878109993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11878109997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11878109993) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1838629 + ... + 1845077.

It is an arithmetic number, because the mean of its divisors is an integer number (540445500).

Almost surely, 2^11878109997 is an apocalyptic number.

It is an amenable number.

11878109997 is a deficient number, since it is larger than the sum of its proper divisors (5416146003).

11878109997 is a wasteful number, since it uses less digits than its factorization.

11878109997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7117.

The product of its (nonzero) digits is 2286144, while the sum is 60.

The spelling of 11878109997 in words is "eleven billion, eight hundred seventy-eight million, one hundred nine thousand, nine hundred ninety-seven".