16581250982 has 4 divisors (see below), whose sum is σ = 24871876476. Its totient is φ = 8290625490.

The previous prime is 16581250979. The next prime is 16581250991. The reversal of 16581250982 is 28905218561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28905218561 = 1249 ⋅23142689.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4145312744 + ... + 4145312747.

It is an arithmetic number, because the mean of its divisors is an integer number (6217969119).

Almost surely, 2^16581250982 is an apocalyptic number.

16581250982 is a deficient number, since it is larger than the sum of its proper divisors (8290625494).

16581250982 is an equidigital number, since it uses as much as digits as its factorization.

16581250982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8290625493.

The product of its (nonzero) digits is 345600, while the sum is 47.

The spelling of 16581250982 in words is "sixteen billion, five hundred eighty-one million, two hundred fifty thousand, nine hundred eighty-two".