15503331540 has 24 divisors (see below), whose sum is σ = 43409328480. Its totient is φ = 4134221728.

The previous prime is 15503331533. The next prime is 15503331559. The reversal of 15503331540 is 4513330551.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 15503331498 and 15503331507.

It is a congruent number.

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, 129194370 + ... + 129194489.

It is an arithmetic number, because the mean of its divisors is an integer number (1808722020).

Almost surely, 2^15503331540 is an apocalyptic number.

15503331540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15503331540 is an abundant number, since it is smaller than the sum of its proper divisors (27905996940).

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

15503331540 is a wasteful number, since it uses less digits than its factorization.

15503331540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258388871 (or 258388869 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 30.

The spelling of 15503331540 in words is "fifteen billion, five hundred three million, three hundred thirty-one thousand, five hundred forty".