85642618745 has 4 divisors (see below), whose sum is σ = 102771142500. Its totient is φ = 68514094992.

The previous prime is 85642618729. The next prime is 85642618847. The reversal of 85642618745 is 54781624658.

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

It can be written as a sum of positive squares in 2 ways, for example, as 63381083536 + 22261535209 = 251756^2 + 149203^2 .

It is a cyclic number.

It is not a de Polignac number, because 85642618745 - 2⁴ = 85642618729 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8564261870 + ... + 8564261879.

It is an arithmetic number, because the mean of its divisors is an integer number (25692785625).

Almost surely, 2^85642618745 is an apocalyptic number.

It is an amenable number.

85642618745 is a deficient number, since it is larger than the sum of its proper divisors (17128523755).

85642618745 is a wasteful number, since it uses less digits than its factorization.

85642618745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17128523754.

The product of its digits is 12902400, while the sum is 56.

The spelling of 85642618745 in words is "eighty-five billion, six hundred forty-two million, six hundred eighteen thousand, seven hundred forty-five".