82636635883661 has 4 divisors (see below), whose sum is σ = 85302333815424. Its totient is φ = 79970937951900.

The previous prime is 82636635883619. The next prime is 82636635883741. The reversal of 82636635883661 is 16638853663628.

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 82636635883661 - 2⁶ = 82636635883597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82636635886661) 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, 1332848965835 + ... + 1332848965896.

It is an arithmetic number, because the mean of its divisors is an integer number (21325583453856).

Almost surely, 2^{82636635883661} is an apocalyptic number.

It is an amenable number.

82636635883661 is a deficient number, since it is larger than the sum of its proper divisors (2665697931763).

82636635883661 is a wasteful number, since it uses less digits than its factorization.

82636635883661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2665697931762.

The product of its digits is 1074954240, while the sum is 71.

The spelling of 82636635883661 in words is "eighty-two trillion, six hundred thirty-six billion, six hundred thirty-five million, eight hundred eighty-three thousand, six hundred sixty-one".