82501260021 has 32 divisors (see below), whose sum is σ = 123847992320. Its totient is φ = 54273871152.

The previous prime is 82501260011. The next prime is 82501260071. The reversal of 82501260021 is 12006210528.

It is a happy number.

82501260021 is a `hidden beast` number, since 8 + 2 + 50 + 1 + 2 + 600 + 2 + 1 = 666.

It is not a de Polignac number, because 82501260021 - 2¹⁵ = 82501227253 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82501260011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 734610 + ... + 839436.

It is an arithmetic number, because the mean of its divisors is an integer number (3870249760).

Almost surely, 2^82501260021 is an apocalyptic number.

It is an amenable number.

82501260021 is a deficient number, since it is larger than the sum of its proper divisors (41346732299).

82501260021 is a wasteful number, since it uses less digits than its factorization.

82501260021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105222 (or 105216 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

Adding to 82501260021 its reverse (12006210528), we get a palindrome (94507470549).

The spelling of 82501260021 in words is "eighty-two billion, five hundred one million, two hundred sixty thousand, twenty-one".