82521836907 has 16 divisors (see below), whose sum is σ = 113918775840. Its totient is φ = 53072913152.

The previous prime is 82521836879. The next prime is 82521836927. The reversal of 82521836907 is 70963812528.

It is a cyclic number.

It is not a de Polignac number, because 82521836907 - 2⁶ = 82521836843 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 82521836907.

It is not an unprimeable number, because it can be changed into a prime (82521836927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 293748 + ... + 501329.

It is an arithmetic number, because the mean of its divisors is an integer number (7119923490).

Almost surely, 2^82521836907 is an apocalyptic number.

82521836907 is a gapful number since it is divisible by the number (87) formed by its first and last digit.

82521836907 is a deficient number, since it is larger than the sum of its proper divisors (31396938933).

82521836907 is a wasteful number, since it uses less digits than its factorization.

82521836907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796302.

The product of its (nonzero) digits is 1451520, while the sum is 51.

The spelling of 82521836907 in words is "eighty-two billion, five hundred twenty-one million, eight hundred thirty-six thousand, nine hundred seven".