15150136640 has 28 divisors (see below), whose sum is σ = 36076263636. Its totient is φ = 6060054528.

The previous prime is 15150136613. The next prime is 15150136649. The reversal of 15150136640 is 4663105151.

It can be written as a sum of positive squares in 2 ways, for example, as 4172126464 + 10978010176 = 64592^2 + 104776^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 15150136597 and 15150136606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15150136649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23671769 + ... + 23672408.

It is an arithmetic number, because the mean of its divisors is an integer number (1288437987).

Almost surely, 2^15150136640 is an apocalyptic number.

15150136640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15150136640 is an abundant number, since it is smaller than the sum of its proper divisors (20926126996).

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

15150136640 is an equidigital number, since it uses as much as digits as its factorization.

15150136640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47344194 (or 47344184 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 32.

The spelling of 15150136640 in words is "fifteen billion, one hundred fifty million, one hundred thirty-six thousand, six hundred forty".