85642607240 has 32 divisors (see below), whose sum is σ = 194102417880. Its totient is φ = 34006989312.

The previous prime is 85642607231. The next prime is 85642607249. The reversal of 85642607240 is 4270624658.

It is an interprime number because it is at equal distance from previous prime (85642607231) and next prime (85642607249).

It can be written as a sum of positive squares in 4 ways, for example, as 77761784164 + 7880823076 = 278858^2 + 88774^2 .

It is a junction number, because it is equal to n+sod(n) for n = 85642607191 and 85642607200.

It is not an unprimeable number, because it can be changed into a prime (85642607249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7808627 + ... + 7819586.

Almost surely, 2^85642607240 is an apocalyptic number.

It is an amenable number.

85642607240 is an abundant number, since it is smaller than the sum of its proper divisors (108459810640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85642607240 is a wasteful number, since it uses less digits than its factorization.

85642607240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15628361 (or 15628357 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 44.

The spelling of 85642607240 in words is "eighty-five billion, six hundred forty-two million, six hundred seven thousand, two hundred forty".