15506622240 has 48 divisors (see below), whose sum is σ = 48845861568. Its totient is φ = 4135099136.

The previous prime is 15506622239. The next prime is 15506622331. The reversal of 15506622240 is 4222660551.

It is a tau number, because it is divible by the number of its divisors (48).

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 7 ways as a sum of consecutive naturals, for example, 16152252 + ... + 16153211.

It is an arithmetic number, because the mean of its divisors is an integer number (1017622116).

Almost surely, 2^15506622240 is an apocalyptic number.

15506622240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15506622240 is an abundant number, since it is smaller than the sum of its proper divisors (33339239328).

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

15506622240 is a wasteful number, since it uses less digits than its factorization.

15506622240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32305481 (or 32305473 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 33.

The spelling of 15506622240 in words is "fifteen billion, five hundred six million, six hundred twenty-two thousand, two hundred forty".