11601574231878 has 64 divisors (see below), whose sum is σ = 25897369021440. Its totient is φ = 3849800594400.

The previous prime is 11601574231769. The next prime is 11601574231883. The reversal of 11601574231878 is 87813247510611.

It is a happy number.

11601574231878 is a `hidden beast` number, since 1 + 1 + 60 + 1 + 574 + 2 + 3 + 1 + 8 + 7 + 8 = 666.

It is a super-2 number, since 2×11601574231878² (a number of 27 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17781813 + ... + 18422703.

It is an arithmetic number, because the mean of its divisors is an integer number (404646390960).

Almost surely, 2^{11601574231878} is an apocalyptic number.

11601574231878 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

11601574231878 is an abundant number, since it is smaller than the sum of its proper divisors (14295794789562).

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

11601574231878 is a wasteful number, since it uses less digits than its factorization.

11601574231878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642410 (or 642404 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 54.

The spelling of 11601574231878 in words is "eleven trillion, six hundred one billion, five hundred seventy-four million, two hundred thirty-one thousand, eight hundred seventy-eight".