11555365140 has 144 divisors (see below), whose sum is σ = 39900422016. Its totient is φ = 2679494400.

The previous prime is 11555365139. The next prime is 11555365141. The reversal of 11555365140 is 4156355511.

11555365140 is a `hidden beast` number, since 1 + 1 + 5 + 553 + 65 + 1 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (11555365139) and next prime (11555365141).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 11555365095 and 11555365104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11555365141) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 81331 + ... + 172410.

It is an arithmetic number, because the mean of its divisors is an integer number (277086264).

Almost surely, 2^11555365140 is an apocalyptic number.

11555365140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11555365140 is an abundant number, since it is smaller than the sum of its proper divisors (28345056876).

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

11555365140 is a wasteful number, since it uses less digits than its factorization.

11555365140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253790 (or 253785 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

The spelling of 11555365140 in words is "eleven billion, five hundred fifty-five million, three hundred sixty-five thousand, one hundred forty".