83861262720021 has 8 divisors (see below), whose sum is σ = 112250094848064. Its totient is φ = 55689969536000.

The previous prime is 83861262719963. The next prime is 83861262720031. The reversal of 83861262720021 is 12002726216838.

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

It is a cyclic number.

It is not a de Polignac number, because 83861262720021 - 2²⁵ = 83861229165589 is a prime.

It is a super-2 number, since 2×83861262720021² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83861262720031) 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, 54384735105 + ... + 54384736646.

It is an arithmetic number, because the mean of its divisors is an integer number (14031261856008).

Almost surely, 2^{83861262720021} is an apocalyptic number.

It is an amenable number.

83861262720021 is a deficient number, since it is larger than the sum of its proper divisors (28388832128043).

83861262720021 is a wasteful number, since it uses less digits than its factorization.

83861262720021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108769472011.

The product of its (nonzero) digits is 774144, while the sum is 48.

Adding to 83861262720021 its reverse (12002726216838), we get a palindrome (95863988936859).

The spelling of 83861262720021 in words is "eighty-three trillion, eight hundred sixty-one billion, two hundred sixty-two million, seven hundred twenty thousand, twenty-one".