85811007655451 has 4 divisors (see below), whose sum is σ = 92411854398192. Its totient is φ = 79210160912712.

The previous prime is 85811007655447. The next prime is 85811007655469. The reversal of 85811007655451 is 15455670011858.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85811007655451 - 2² = 85811007655447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85811007655421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3300423371351 + ... + 3300423371376.

It is an arithmetic number, because the mean of its divisors is an integer number (23102963599548).

Almost surely, 2^{85811007655451} is an apocalyptic number.

85811007655451 is a deficient number, since it is larger than the sum of its proper divisors (6600846742741).

85811007655451 is a wasteful number, since it uses less digits than its factorization.

85811007655451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6600846742740.

The product of its (nonzero) digits is 6720000, while the sum is 56.

The spelling of 85811007655451 in words is "eighty-five trillion, eight hundred eleven billion, seven million, six hundred fifty-five thousand, four hundred fifty-one".