86220187540 has 24 divisors (see below), whose sum is σ = 181093191552. Its totient is φ = 34482208800.

The previous prime is 86220187499. The next prime is 86220187577. The reversal of 86220187540 is 4578102268.

It is a happy number.

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, 245136 + ... + 482215.

It is an arithmetic number, because the mean of its divisors is an integer number (7545549648).

Almost surely, 2^86220187540 is an apocalyptic number.

It is an amenable number.

86220187540 is an abundant number, since it is smaller than the sum of its proper divisors (94873004012).

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

86220187540 is a wasteful number, since it uses less digits than its factorization.

86220187540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733287 (or 733285 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 43.

The spelling of 86220187540 in words is "eighty-six billion, two hundred twenty million, one hundred eighty-seven thousand, five hundred forty".