11855797384 has 24 divisors (see below), whose sum is σ = 23461183710. Its totient is φ = 5615902656.

The previous prime is 11855797367. The next prime is 11855797397. The reversal of 11855797384 is 48379755811.

It can be written as a sum of positive squares in only one way, i.e., 9995600484 + 1860196900 = 99978^2 + 43130^2 .

It is a super-2 number, since 2×11855797384² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2049709 + ... + 2055484.

Almost surely, 2^11855797384 is an apocalyptic number.

It is an amenable number.

11855797384 is a deficient number, since it is larger than the sum of its proper divisors (11605386326).

11855797384 is a wasteful number, since it uses less digits than its factorization.

11855797384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4105237 (or 4105214 counting only the distinct ones).

The product of its digits is 8467200, while the sum is 58.

The spelling of 11855797384 in words is "eleven billion, eight hundred fifty-five million, seven hundred ninety-seven thousand, three hundred eighty-four".