82506894457 has 8 divisors (see below), whose sum is σ = 88855840136. Its totient is φ = 76158271872.

The previous prime is 82506894443. The next prime is 82506894493. The reversal of 82506894457 is 75449860528.

It can be written as a sum of positive squares in 4 ways, for example, as 94264681 + 82412629776 = 9709^2 + 287076^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82506894457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82506894157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 830173 + ... + 924229.

It is an arithmetic number, because the mean of its divisors is an integer number (11106980017).

Almost surely, 2^82506894457 is an apocalyptic number.

It is an amenable number.

82506894457 is a deficient number, since it is larger than the sum of its proper divisors (6348945679).

82506894457 is a wasteful number, since it uses less digits than its factorization.

82506894457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161547.

The product of its (nonzero) digits is 19353600, while the sum is 58.

The spelling of 82506894457 in words is "eighty-two billion, five hundred six million, eight hundred ninety-four thousand, four hundred fifty-seven".