85461578643 has 16 divisors (see below), whose sum is σ = 130234300416. Its totient is φ = 48832512960.

The previous prime is 85461578641. The next prime is 85461578687. The reversal of 85461578643 is 34687516458.

It is not a de Polignac number, because 85461578643 - 2¹ = 85461578641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85461578641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 319903 + ... + 522743.

It is an arithmetic number, because the mean of its divisors is an integer number (8139643776).

Almost surely, 2^85461578643 is an apocalyptic number.

85461578643 is a deficient number, since it is larger than the sum of its proper divisors (44772721773).

85461578643 is a wasteful number, since it uses less digits than its factorization.

85461578643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222914.

The product of its digits is 19353600, while the sum is 57.

The spelling of 85461578643 in words is "eighty-five billion, four hundred sixty-one million, five hundred seventy-eight thousand, six hundred forty-three".