11257784784 has 80 divisors (see below), whose sum is σ = 32327415040. Its totient is φ = 3751038720.

The previous prime is 11257784767. The next prime is 11257784831. The reversal of 11257784784 is 48748775211.

It is a happy number.

11257784784 is a `hidden beast` number, since 112 + 57 + 7 + 8 + 478 + 4 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 11257784784.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1565004 + ... + 1572180.

It is an arithmetic number, because the mean of its divisors is an integer number (404092688).

Almost surely, 2^11257784784 is an apocalyptic number.

It is an amenable number.

11257784784 is an abundant number, since it is smaller than the sum of its proper divisors (21069630256).

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

11257784784 is a wasteful number, since it uses less digits than its factorization.

11257784784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10825 (or 10813 counting only the distinct ones).

The product of its digits is 3512320, while the sum is 54.

The spelling of 11257784784 in words is "eleven billion, two hundred fifty-seven million, seven hundred eighty-four thousand, seven hundred eighty-four".