82115402257 has 4 divisors (see below), whose sum is σ = 93846174016. Its totient is φ = 70384630500.

The previous prime is 82115402251. The next prime is 82115402381. The reversal of 82115402257 is 75220451128.

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 82115402257 - 2¹¹ = 82115400209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82115402251) 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, 5865385869 + ... + 5865385882.

It is an arithmetic number, because the mean of its divisors is an integer number (23461543504).

Almost surely, 2^82115402257 is an apocalyptic number.

It is an amenable number.

82115402257 is a deficient number, since it is larger than the sum of its proper divisors (11730771759).

82115402257 is a wasteful number, since it uses less digits than its factorization.

82115402257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11730771758.

The product of its (nonzero) digits is 44800, while the sum is 37.

The spelling of 82115402257 in words is "eighty-two billion, one hundred fifteen million, four hundred two thousand, two hundred fifty-seven".