82642753565021 has 32 divisors (see below), whose sum is σ = 92049932620800. Its totient is φ = 73680921699840.

The previous prime is 82642753564981. The next prime is 82642753565033. The reversal of 82642753565021 is 12056535724628.

It is a de Polignac number, because none of the positive numbers 2^k-82642753565021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82642753565321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2400364835 + ... + 2400399263.

It is an arithmetic number, because the mean of its divisors is an integer number (2876560394400).

Almost surely, 2^{82642753565021} is an apocalyptic number.

It is an amenable number.

82642753565021 is a deficient number, since it is larger than the sum of its proper divisors (9407179055779).

82642753565021 is a wasteful number, since it uses less digits than its factorization.

82642753565021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45909.

The product of its (nonzero) digits is 24192000, while the sum is 56.

The spelling of 82642753565021 in words is "eighty-two trillion, six hundred forty-two billion, seven hundred fifty-three million, five hundred sixty-five thousand, twenty-one".