82519921641 has 8 divisors (see below), whose sum is σ = 110028864960. Its totient is φ = 55012129712.

The previous prime is 82519921613. The next prime is 82519921681. The reversal of 82519921641 is 14612991528.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 82519921641 - 2¹³ = 82519913449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82519921681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103806 + ... + 419303.

It is an arithmetic number, because the mean of its divisors is an integer number (13753608120).

Almost surely, 2^82519921641 is an apocalyptic number.

It is an amenable number.

82519921641 is a deficient number, since it is larger than the sum of its proper divisors (27508943319).

82519921641 is a wasteful number, since it uses less digits than its factorization.

82519921641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575695.

The product of its digits is 311040, while the sum is 48.

The spelling of 82519921641 in words is "eighty-two billion, five hundred nineteen million, nine hundred twenty-one thousand, six hundred forty-one".