15210564450 has 48 divisors (see below), whose sum is σ = 38285243040. Its totient is φ = 3995608320.

The previous prime is 15210564427. The next prime is 15210564461. The reversal of 15210564450 is 5446501251.

It is a super-2 number, since 2×15210564450² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 746695 + ... + 766794.

It is an arithmetic number, because the mean of its divisors is an integer number (797609230).

Almost surely, 2^15210564450 is an apocalyptic number.

15210564450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15210564450 is an abundant number, since it is smaller than the sum of its proper divisors (23074678590).

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

15210564450 is a wasteful number, since it uses less digits than its factorization.

15210564450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1513571 (or 1513566 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 33.

The spelling of 15210564450 in words is "fifteen billion, two hundred ten million, five hundred sixty-four thousand, four hundred fifty".