85642620079 has 2 divisors, whose sum is σ = 85642620080. Its totient is φ = 85642620078.

The previous prime is 85642620001. The next prime is 85642620127. The reversal of 85642620079 is 97002624658.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85642620079 - 2³⁵ = 51282881711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85642620379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42821310039 + 42821310040.

It is an arithmetic number, because the mean of its divisors is an integer number (42821310040).

Almost surely, 2^85642620079 is an apocalyptic number.

85642620079 is a deficient number, since it is larger than the sum of its proper divisors (1).

85642620079 is an equidigital number, since it uses as much as digits as its factorization.

85642620079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1451520, while the sum is 49.

The spelling of 85642620079 in words is "eighty-five billion, six hundred forty-two million, six hundred twenty thousand, seventy-nine".