15530055540 has 24 divisors (see below), whose sum is σ = 43484155680. Its totient is φ = 4141348128.

The previous prime is 15530055539. The next prime is 15530055557. The reversal of 15530055540 is 4555003551.

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, 129417070 + ... + 129417189.

It is an arithmetic number, because the mean of its divisors is an integer number (1811839820).

Almost surely, 2^15530055540 is an apocalyptic number.

15530055540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15530055540 is an abundant number, since it is smaller than the sum of its proper divisors (27954100140).

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

15530055540 is a wasteful number, since it uses less digits than its factorization.

15530055540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258834271 (or 258834269 counting only the distinct ones).

The product of its (nonzero) digits is 37500, while the sum is 33.

The spelling of 15530055540 in words is "fifteen billion, five hundred thirty million, fifty-five thousand, five hundred forty".