11781372100 has 18 divisors (see below), whose sum is σ = 25565577674. Its totient is φ = 4712548800.

The previous prime is 11781372013. The next prime is 11781372103. The reversal of 11781372100 is 127318711.

It can be written as a sum of positive squares in 3 ways, for example, as 3367713024 + 8413659076 = 58032^2 + 91726^2 .

It is not an unprimeable number, because it can be changed into a prime (11781372103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 58906761 + ... + 58906960.

Almost surely, 2^11781372100 is an apocalyptic number.

11781372100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11781372100 is an abundant number, since it is smaller than the sum of its proper divisors (13784205574).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11781372100 is a wasteful number, since it uses less digits than its factorization.

11781372100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117813735 (or 117813728 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 31.

The spelling of 11781372100 in words is "eleven billion, seven hundred eighty-one million, three hundred seventy-two thousand, one hundred".