82961404275421 has 4 divisors (see below), whose sum is σ = 94813033457632. Its totient is φ = 71109775093212.

The previous prime is 82961404275403. The next prime is 82961404275469. The reversal of 82961404275421 is 12457240416928.

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 82961404275421 - 2⁵ = 82961404275389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82961404225421) 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, 5925814591095 + ... + 5925814591108.

It is an arithmetic number, because the mean of its divisors is an integer number (23703258364408).

Almost surely, 2^{82961404275421} is an apocalyptic number.

It is an amenable number.

82961404275421 is a deficient number, since it is larger than the sum of its proper divisors (11851629182211).

82961404275421 is a wasteful number, since it uses less digits than its factorization.

82961404275421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11851629182210.

The product of its (nonzero) digits is 7741440, while the sum is 55.

The spelling of 82961404275421 in words is "eighty-two trillion, nine hundred sixty-one billion, four hundred four million, two hundred seventy-five thousand, four hundred twenty-one".