85170742451 has 2 divisors, whose sum is σ = 85170742452. Its totient is φ = 85170742450.

The previous prime is 85170742403. The next prime is 85170742499. The reversal of 85170742451 is 15424707158.

It is a balanced prime because it is at equal distance from previous prime (85170742403) and next prime (85170742499).

It is a cyclic number.

It is not a de Polignac number, because 85170742451 - 2³⁴ = 67990873267 is a prime.

It is not a weakly prime, because it can be changed into another prime (85170772451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42585371225 + 42585371226.

It is an arithmetic number, because the mean of its divisors is an integer number (42585371226).

Almost surely, 2^85170742451 is an apocalyptic number.

85170742451 is a deficient number, since it is larger than the sum of its proper divisors (1).

85170742451 is an equidigital number, since it uses as much as digits as its factorization.

85170742451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 313600, while the sum is 44.

The spelling of 85170742451 in words is "eighty-five billion, one hundred seventy million, seven hundred forty-two thousand, four hundred fifty-one".