15320375640 has 160 divisors (see below), whose sum is σ = 54203886000. Its totient is φ = 3870395136.

The previous prime is 15320375599. The next prime is 15320375671. The reversal of 15320375640 is 4657302351.

15320375640 is a `hidden beast` number, since 1 + 5 + 3 + 2 + 0 + 3 + 7 + 5 + 640 = 666.

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 = 15320375595 and 15320375604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 62875 + ... + 185994.

Almost surely, 2^15320375640 is an apocalyptic number.

15320375640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15320375640 is an abundant number, since it is smaller than the sum of its proper divisors (38883510360).

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

15320375640 is a wasteful number, since it uses less digits than its factorization.

15320375640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248911 (or 248898 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 36.

Adding to 15320375640 its reverse (4657302351), we get a palindrome (19977677991).

The spelling of 15320375640 in words is "fifteen billion, three hundred twenty million, three hundred seventy-five thousand, six hundred forty".