82510025103509 has 4 divisors (see below), whose sum is σ = 82801579962816. Its totient is φ = 82218470244204.

The previous prime is 82510025103503. The next prime is 82510025103523. The reversal of 82510025103509 is 90530152001528.

It is a happy number.

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 82510025103509 - 2²⁴ = 82510008326293 is a prime.

It is a super-2 number, since 2×82510025103509² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82510025103503) 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, 145777429229 + ... + 145777429794.

It is an arithmetic number, because the mean of its divisors is an integer number (20700394990704).

Almost surely, 2^{82510025103509} is an apocalyptic number.

It is an amenable number.

82510025103509 is a deficient number, since it is larger than the sum of its proper divisors (291554859307).

82510025103509 is a wasteful number, since it uses less digits than its factorization.

82510025103509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291554859306.

The product of its (nonzero) digits is 108000, while the sum is 41.

The spelling of 82510025103509 in words is "eighty-two trillion, five hundred ten billion, twenty-five million, one hundred three thousand, five hundred nine".