82509687501 has 4 divisors (see below), whose sum is σ = 110012916672. Its totient is φ = 55006458332.

The previous prime is 82509687457. The next prime is 82509687553. The reversal of 82509687501 is 10578690528.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 82509687501 - 2¹⁸ = 82509425357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82509687571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13751614581 + ... + 13751614586.

It is an arithmetic number, because the mean of its divisors is an integer number (27503229168).

Almost surely, 2^82509687501 is an apocalyptic number.

It is an amenable number.

82509687501 is a deficient number, since it is larger than the sum of its proper divisors (27503229171).

82509687501 is a wasteful number, since it uses less digits than its factorization.

82509687501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27503229170.

The product of its (nonzero) digits is 1209600, while the sum is 51.

The spelling of 82509687501 in words is "eighty-two billion, five hundred nine million, six hundred eighty-seven thousand, five hundred one".