5021661500 has 24 divisors (see below), whose sum is σ = 10967309808. Its totient is φ = 2008664400.

The previous prime is 5021661493. The next prime is 5021661503. The reversal of 5021661500 is 51661205.

It is a self number, because there is not a number n which added to its sum of digits gives 5021661500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5021661503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5021162 + ... + 5022161.

It is an arithmetic number, because the mean of its divisors is an integer number (456971242).

Almost surely, 2^5021661500 is an apocalyptic number.

5021661500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

5021661500 is an abundant number, since it is smaller than the sum of its proper divisors (5945648308).

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

5021661500 is a wasteful number, since it uses less digits than its factorization.

5021661500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10043342 (or 10043330 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 5021661500 is about 70863.6825179160. The cubic root of 5021661500 is about 1712.4417654731.

The spelling of 5021661500 in words is "five billion, twenty-one million, six hundred sixty-one thousand, five hundred".