85902819640 has 32 divisors (see below), whose sum is σ = 210852376560. Its totient is φ = 31237388800.

The previous prime is 85902819637. The next prime is 85902819647. The reversal of 85902819640 is 4691820958.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85902819647) 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, 97616401 + ... + 97617280.

Almost surely, 2^85902819640 is an apocalyptic number.

It is an amenable number.

85902819640 is an abundant number, since it is smaller than the sum of its proper divisors (124949556920).

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

85902819640 is a wasteful number, since it uses less digits than its factorization.

85902819640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195233703 (or 195233699 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 52.

The spelling of 85902819640 in words is "eighty-five billion, nine hundred two million, eight hundred nineteen thousand, six hundred forty".