82502556787 has 4 divisors (see below), whose sum is σ = 94288636336. Its totient is φ = 70716477240.

The previous prime is 82502556781. The next prime is 82502556883. The reversal of 82502556787 is 78765520528.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82502556787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82502556781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5893039764 + ... + 5893039777.

It is an arithmetic number, because the mean of its divisors is an integer number (23572159084).

Almost surely, 2^82502556787 is an apocalyptic number.

82502556787 is a deficient number, since it is larger than the sum of its proper divisors (11786079549).

82502556787 is a wasteful number, since it uses less digits than its factorization.

82502556787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11786079548.

The product of its (nonzero) digits is 9408000, while the sum is 55.

The spelling of 82502556787 in words is "eighty-two billion, five hundred two million, five hundred fifty-six thousand, seven hundred eighty-seven".