15506542320 has 40 divisors (see below), whose sum is σ = 48070281936. Its totient is φ = 4135077888.

The previous prime is 15506542279. The next prime is 15506542379. The reversal of 15506542320 is 2324560551.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32305057 + ... + 32305536.

Almost surely, 2^15506542320 is an apocalyptic number.

15506542320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15506542320 is an abundant number, since it is smaller than the sum of its proper divisors (32563739616).

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

15506542320 is a wasteful number, since it uses less digits than its factorization.

15506542320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64610609 (or 64610603 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 33.

The spelling of 15506542320 in words is "fifteen billion, five hundred six million, five hundred forty-two thousand, three hundred twenty".