86861840492 has 12 divisors (see below), whose sum is σ = 173723681040. Its totient is φ = 37226503056.

The previous prime is 86861840479. The next prime is 86861840497. The reversal of 86861840492 is 29404816868.

86861840492 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (86861840497) 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, 1551104267 + ... + 1551104322.

It is an arithmetic number, because the mean of its divisors is an integer number (14476973420).

Almost surely, 2^86861840492 is an apocalyptic number.

It is an amenable number.

86861840492 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

86861840492 is a wasteful number, since it uses less digits than its factorization.

86861840492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3102208600 (or 3102208598 counting only the distinct ones).

The product of its (nonzero) digits is 5308416, while the sum is 56.

The spelling of 86861840492 in words is "eighty-six billion, eight hundred sixty-one million, eight hundred forty thousand, four hundred ninety-two".