15193902640 has 40 divisors (see below), whose sum is σ = 40372371360. Its totient is φ = 5209337856.

The previous prime is 15193902613. The next prime is 15193902641. The reversal of 15193902640 is 4620939151.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 15193902593 and 15193902602.

It is not an unprimeable number, because it can be changed into a prime (15193902641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13565425 + ... + 13566544.

It is an arithmetic number, because the mean of its divisors is an integer number (1009309284).

Almost surely, 2^15193902640 is an apocalyptic number.

15193902640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15193902640 is an abundant number, since it is smaller than the sum of its proper divisors (25178468720).

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

15193902640 is a wasteful number, since it uses less digits than its factorization.

15193902640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27131989 (or 27131983 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 40.

The spelling of 15193902640 in words is "fifteen billion, one hundred ninety-three million, nine hundred two thousand, six hundred forty".