862661956579 has 2 divisors, whose sum is σ = 862661956580. Its totient is φ = 862661956578.

The previous prime is 862661956577. The next prime is 862661956661. The reversal of 862661956579 is 975659166268.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 862661956579 - 2¹ = 862661956577 is a prime.

Together with 862661956577, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (862661956577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 431330978289 + 431330978290.

It is an arithmetic number, because the mean of its divisors is an integer number (431330978290).

Almost surely, 2^862661956579 is an apocalyptic number.

862661956579 is a deficient number, since it is larger than the sum of its proper divisors (1).

862661956579 is an equidigital number, since it uses as much as digits as its factorization.

862661956579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 293932800, while the sum is 70.

The spelling of 862661956579 in words is "eight hundred sixty-two billion, six hundred sixty-one million, nine hundred fifty-six thousand, five hundred seventy-nine".