15553020540 has 96 divisors (see below), whose sum is σ = 45003700224. Its totient is φ = 4009178880.

The previous prime is 15553020533. The next prime is 15553020577. The reversal of 15553020540 is 4502035551.

It is a happy number.

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 = 15553020498 and 15553020507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1850227 + ... + 1858613.

It is an arithmetic number, because the mean of its divisors is an integer number (468788544).

Almost surely, 2^15553020540 is an apocalyptic number.

15553020540 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 15553020540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22501850112).

15553020540 is an abundant number, since it is smaller than the sum of its proper divisors (29450679684).

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

15553020540 is a wasteful number, since it uses less digits than its factorization.

15553020540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9427 (or 9425 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 30.

The spelling of 15553020540 in words is "fifteen billion, five hundred fifty-three million, twenty thousand, five hundred forty".