5518157500 has 120 divisors (see below), whose sum is σ = 12873866544. Its totient is φ = 2061696000.

The previous prime is 5518157471. The next prime is 5518157503. The reversal of 5518157500 is 57518155.

It is a self number, because there is not a number n which added to its sum of digits gives 5518157500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5518157503) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6672087 + ... + 6672913.

Almost surely, 2^5518157500 is an apocalyptic number.

5518157500 is a gapful number since it is divisible by the number (50) 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 5518157500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6436933272).

5518157500 is an abundant number, since it is smaller than the sum of its proper divisors (7355709044).

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

5518157500 is a wasteful number, since it uses less digits than its factorization.

5518157500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025 (or 1008 counting only the distinct ones).

The product of its (nonzero) digits is 35000, while the sum is 37.

The square root of 5518157500 is about 74284.3018409677. The cubic root of 5518157500 is about 1767.1145278851.

The spelling of 5518157500 in words is "five billion, five hundred eighteen million, one hundred fifty-seven thousand, five hundred".