11919297860 has 24 divisors (see below), whose sum is σ = 25160225496. Its totient is φ = 4743014400.

The previous prime is 11919297857. The next prime is 11919297877. The reversal of 11919297860 is 6879291911.

It can be written as a sum of positive squares in 4 ways, for example, as 2562991876 + 9356305984 = 50626^2 + 96728^2 .

It is a super-2 number, since 2×11919297860² (a number of 21 digits) contains 22 as substring.

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, 1540091 + ... + 1547810.

It is an arithmetic number, because the mean of its divisors is an integer number (1048342729).

Almost surely, 2^11919297860 is an apocalyptic number.

11919297860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11919297860 is an abundant number, since it is smaller than the sum of its proper divisors (13240927636).

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

11919297860 is a wasteful number, since it uses less digits than its factorization.

11919297860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3088103 (or 3088101 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 53.

The spelling of 11919297860 in words is "eleven billion, nine hundred nineteen million, two hundred ninety-seven thousand, eight hundred sixty".