85388027640 has 32 divisors (see below), whose sum is σ = 256164083280. Its totient is φ = 22770140672.

The previous prime is 85388027629. The next prime is 85388027651. The reversal of 85388027640 is 4672088358.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (85388027629) and next prime (85388027651).

It is a super-2 number, since 2×85388027640² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355783329 + ... + 355783568.

Almost surely, 2^85388027640 is an apocalyptic number.

It is an amenable number.

85388027640 is an abundant number, since it is smaller than the sum of its proper divisors (170776055640).

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

85388027640 is a wasteful number, since it uses less digits than its factorization.

85388027640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711566911 (or 711566907 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 51.

The spelling of 85388027640 in words is "eighty-five billion, three hundred eighty-eight million, twenty-seven thousand, six hundred forty".