85718655451 has 24 divisors (see below), whose sum is σ = 101305388880. Its totient is φ = 71897904000.

The previous prime is 85718655443. The next prime is 85718655457. The reversal of 85718655451 is 15455681758.

It is a happy number.

It is not a de Polignac number, because 85718655451 - 2³ = 85718655443 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85718655392 and 85718655401.

It is not an unprimeable number, because it can be changed into a prime (85718655457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4431501 + ... + 4450801.

It is an arithmetic number, because the mean of its divisors is an integer number (4221057870).

Almost surely, 2^85718655451 is an apocalyptic number.

85718655451 is a deficient number, since it is larger than the sum of its proper divisors (15586733429).

85718655451 is a wasteful number, since it uses less digits than its factorization.

85718655451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21727 (or 21714 counting only the distinct ones).

The product of its digits is 6720000, while the sum is 55.

The spelling of 85718655451 in words is "eighty-five billion, seven hundred eighteen million, six hundred fifty-five thousand, four hundred fifty-one".