6450221550 has 24 divisors (see below), whose sum is σ = 15996549816. Its totient is φ = 1720059040.

The previous prime is 6450221543. The next prime is 6450221563. The reversal of 6450221550 is 551220546.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21500589 + ... + 21500888.

It is an arithmetic number, because the mean of its divisors is an integer number (666522909).

Almost surely, 2^6450221550 is an apocalyptic number.

6450221550 is an abundant number, since it is smaller than the sum of its proper divisors (9546328266).

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

6450221550 is a wasteful number, since it uses less digits than its factorization.

6450221550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43001492 (or 43001487 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 6450221550 is about 80313.2713192533. The cubic root of 6450221550 is about 1861.4792977923.

The spelling of 6450221550 in words is "six billion, four hundred fifty million, two hundred twenty-one thousand, five hundred fifty".