15223784640 has 448 divisors, whose sum is σ = 52248084480. Its totient is φ = 3746856960.

The previous prime is 15223784633. The next prime is 15223784651. The reversal of 15223784640 is 4648732251.

It is a junction number, because it is equal to n+sod(n) for n = 15223784592 and 15223784601.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 119872257 + ... + 119872383.

Almost surely, 2^15223784640 is an apocalyptic number.

15223784640 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 15223784640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26124042240).

15223784640 is an abundant number, since it is smaller than the sum of its proper divisors (37024299840).

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

15223784640 is a wasteful number, since it uses less digits than its factorization.

15223784640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320 (or 310 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 42.

The spelling of 15223784640 in words is "fifteen billion, two hundred twenty-three million, seven hundred eighty-four thousand, six hundred forty".