1641998115 has 32 divisors (see below), whose sum is σ = 2931379200. Its totient is φ = 872051040.

The previous prime is 1641998089. The next prime is 1641998123. The reversal of 1641998115 is 5118991461.

It is not a de Polignac number, because 1641998115 - 2¹⁸ = 1641735971 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6820 + ... + 57710.

It is an arithmetic number, because the mean of its divisors is an integer number (91605600).

Almost surely, 2^1641998115 is an apocalyptic number.

1641998115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1641998115 is a deficient number, since it is larger than the sum of its proper divisors (1289381085).

1641998115 is a wasteful number, since it uses less digits than its factorization.

1641998115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51144 (or 51138 counting only the distinct ones).

The product of its digits is 77760, while the sum is 45.

The square root of 1641998115 is about 40521.5759195024. The cubic root of 1641998115 is about 1179.7524413639.

The spelling of 1641998115 in words is "one billion, six hundred forty-one million, nine hundred ninety-eight thousand, one hundred fifteen".