115457771520 has 1152 divisors, whose sum is σ = 509341996800. Its totient is φ = 24291311616.

The previous prime is 115457771509. The next prime is 115457771521. The reversal of 115457771520 is 25177754511.

115457771520 is a `hidden beast` number, since 1 + 1 + 5 + 4 + 57 + 7 + 71 + 520 = 666.

It is a tau number, because it is divible by the number of its divisors (1152).

It is a super-2 number, since 2×115457771520² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115457771521) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 327075664 + ... + 327076016.

It is an arithmetic number, because the mean of its divisors is an integer number (442137150).

Almost surely, 2^115457771520 is an apocalyptic number.

115457771520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 115457771520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254670998400).

115457771520 is an abundant number, since it is smaller than the sum of its proper divisors (393884225280).

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

115457771520 is a wasteful number, since it uses less digits than its factorization.

115457771520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422 (or 383 counting only the distinct ones).

The product of its (nonzero) digits is 343000, while the sum is 45.

The spelling of 115457771520 in words is "one hundred fifteen billion, four hundred fifty-seven million, seven hundred seventy-one thousand, five hundred twenty".