1646542450 has 24 divisors (see below), whose sum is σ = 3500079552. Its totient is φ = 564528720.

The previous prime is 1646542379. The next prime is 1646542511. The reversal of 1646542450 is 542456461.

It is a super-2 number, since 2×1646542450² = 5422204079304005000, which contains 22 as substring.

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, 2351854 + ... + 2352553.

It is an arithmetic number, because the mean of its divisors is an integer number (145836648).

Almost surely, 2^1646542450 is an apocalyptic number.

1646542450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1646542450 is an abundant number, since it is smaller than the sum of its proper divisors (1853537102).

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

1646542450 is a wasteful number, since it uses less digits than its factorization.

1646542450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4704426 (or 4704421 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 37.

The square root of 1646542450 is about 40577.6102056294. The cubic root of 1646542450 is about 1180.8397857077.

The spelling of 1646542450 in words is "one billion, six hundred forty-six million, five hundred forty-two thousand, four hundred fifty".