82077625481 has 4 divisors (see below), whose sum is σ = 82084046100. Its totient is φ = 82071204864.

The previous prime is 82077625459. The next prime is 82077625493. The reversal of 82077625481 is 18452677028.

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

It can be written as a sum of positive squares in 2 ways, for example, as 47661439225 + 34416186256 = 218315^2 + 185516^2 .

It is a cyclic number.

It is not a de Polignac number, because 82077625481 - 2³⁰ = 81003883657 is a prime.

It is a super-2 number, since 2×82077625481² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82077622481) 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, 3191096 + ... + 3216713.

It is an arithmetic number, because the mean of its divisors is an integer number (20521011525).

Almost surely, 2^82077625481 is an apocalyptic number.

It is an amenable number.

82077625481 is a deficient number, since it is larger than the sum of its proper divisors (6420619).

82077625481 is a wasteful number, since it uses less digits than its factorization.

82077625481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6420618.

The product of its (nonzero) digits is 1505280, while the sum is 50.

The spelling of 82077625481 in words is "eighty-two billion, seventy-seven million, six hundred twenty-five thousand, four hundred eighty-one".