15622420640 has 384 divisors, whose sum is σ = 43110144000. Its totient is φ = 5313724416.

The previous prime is 15622420637. The next prime is 15622420679. The reversal of 15622420640 is 4602422651.

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 = 15622420597 and 15622420606.

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, 143324906 + ... + 143325014.

It is an arithmetic number, because the mean of its divisors is an integer number (112266000).

Almost surely, 2^15622420640 is an apocalyptic number.

15622420640 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 15622420640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21555072000).

15622420640 is an abundant number, since it is smaller than the sum of its proper divisors (27487723360).

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

15622420640 is a wasteful number, since it uses less digits than its factorization.

15622420640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272 (or 264 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The spelling of 15622420640 in words is "fifteen billion, six hundred twenty-two million, four hundred twenty thousand, six hundred forty".