15235772640 has 384 divisors, whose sum is σ = 55729658880. Its totient is φ = 3457843200.

The previous prime is 15235772639. The next prime is 15235772653. The reversal of 15235772640 is 4627753251.

It is a junction number, because it is equal to n+sod(n) for n = 15235772592 and 15235772601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 24145125 + ... + 24145755.

It is an arithmetic number, because the mean of its divisors is an integer number (145129320).

Almost surely, 2^15235772640 is an apocalyptic number.

15235772640 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 15235772640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27864829440).

15235772640 is an abundant number, since it is smaller than the sum of its proper divisors (40493886240).

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

15235772640 is a wasteful number, since it uses less digits than its factorization.

15235772640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946 (or 938 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 42.

The spelling of 15235772640 in words is "fifteen billion, two hundred thirty-five million, seven hundred seventy-two thousand, six hundred forty".