85642618874 has 8 divisors (see below), whose sum is σ = 128529846900. Its totient is φ = 42799336576.

The previous prime is 85642618871. The next prime is 85642618889. The reversal of 85642618874 is 47881624658.

It can be written as a sum of positive squares in 2 ways, for example, as 80409109225 + 5233509649 = 283565^2 + 72343^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (85642618871) 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, 10981559 + ... + 10989354.

Almost surely, 2^85642618874 is an apocalyptic number.

85642618874 is a deficient number, since it is larger than the sum of its proper divisors (42887228026).

85642618874 is a wasteful number, since it uses less digits than its factorization.

85642618874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21972864.

The product of its digits is 20643840, while the sum is 59.

The spelling of 85642618874 in words is "eighty-five billion, six hundred forty-two million, six hundred eighteen thousand, eight hundred seventy-four".