11919563748 has 30 divisors (see below), whose sum is σ = 31160094966. Its totient is φ = 3973187808.

The previous prime is 11919563729. The next prime is 11919563749. The reversal of 11919563748 is 84736591911.

11919563748 is a `hidden beast` number, since 1 + 1 + 9 + 1 + 9 + 563 + 74 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 6355597284 + 5563966464 = 79722^2 + 74592^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 11919563694 and 11919563703.

It is not an unprimeable number, because it can be changed into a prime (11919563749) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 18394065 + ... + 18394712.

Almost surely, 2^11919563748 is an apocalyptic number.

11919563748 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

11919563748 is an abundant number, since it is smaller than the sum of its proper divisors (19240531218).

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

11919563748 is a wasteful number, since it uses less digits than its factorization.

11919563748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36788793 (or 36788782 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 54.

The spelling of 11919563748 in words is "eleven billion, nine hundred nineteen million, five hundred sixty-three thousand, seven hundred forty-eight".