981894465 has 48 divisors (see below), whose sum is σ = 1797818880. Its totient is φ = 494968320.

The previous prime is 981894451. The next prime is 981894479. The reversal of 981894465 is 564498189.

981894465 is a `hidden beast` number, since 98 + 1 + 8 + 94 + 465 = 666.

It is an interprime number because it is at equal distance from previous prime (981894451) and next prime (981894479).

It is not a de Polignac number, because 981894465 - 2⁶ = 981894401 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 51801 + ... + 68169.

It is an arithmetic number, because the mean of its divisors is an integer number (37454560).

Almost surely, 2^981894465 is an apocalyptic number.

It is an amenable number.

981894465 is a deficient number, since it is larger than the sum of its proper divisors (815924415).

981894465 is a wasteful number, since it uses less digits than its factorization.

981894465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16454 (or 16451 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 54.

The square root of 981894465 is about 31335.1953081515. The cubic root of 981894465 is about 993.9280274381.

The spelling of 981894465 in words is "nine hundred eighty-one million, eight hundred ninety-four thousand, four hundred sixty-five".