115604387640 has 192 divisors, whose sum is σ = 431060909760. Its totient is φ = 26320896000.

The previous prime is 115604387579. The next prime is 115604387671. The reversal of 115604387640 is 46783406511.

115604387640 is a `hidden beast` number, since 1 + 1 + 5 + 604 + 38 + 7 + 6 + 4 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 558390 + ... + 736890.

It is an arithmetic number, because the mean of its divisors is an integer number (2245108905).

Almost surely, 2^115604387640 is an apocalyptic number.

115604387640 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 115604387640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215530454880).

115604387640 is an abundant number, since it is smaller than the sum of its proper divisors (315456522120).

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

115604387640 is a wasteful number, since it uses less digits than its factorization.

115604387640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178782 (or 178775 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 115604387640 in words is "one hundred fifteen billion, six hundred four million, three hundred eighty-seven thousand, six hundred forty".