115664540 has 48 divisors (see below), whose sum is σ = 249359040. Its totient is φ = 45050880.

The previous prime is 115664537. The next prime is 115664543. The reversal of 115664540 is 45466511.

It is an interprime number because it is at equal distance from previous prime (115664537) and next prime (115664543).

It is a junction number, because it is equal to n+sod(n) for n = 115664497 and 115664506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115664543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137441 + ... + 138279.

It is an arithmetic number, because the mean of its divisors is an integer number (5194980).

Almost surely, 2^115664540 is an apocalyptic number.

115664540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115664540 is an abundant number, since it is smaller than the sum of its proper divisors (133694500).

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

115664540 is a wasteful number, since it uses less digits than its factorization.

115664540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022 (or 1020 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 115664540 is about 10754.7449993015. The cubic root of 115664540 is about 487.2293163101.

The spelling of 115664540 in words is "one hundred fifteen million, six hundred sixty-four thousand, five hundred forty".