81119396286 has 48 divisors (see below), whose sum is σ = 179045802000. Its totient is φ = 26537094144.

The previous prime is 81119396273. The next prime is 81119396287. The reversal of 81119396286 is 68269391118.

81119396286 is a `hidden beast` number, since 8 + 1 + 1 + 1 + 9 + 3 + 9 + 628 + 6 = 666.

It is a super-2 number, since 2×81119396286² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81119396287) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 199390 + ... + 449438.

It is an arithmetic number, because the mean of its divisors is an integer number (3730120875).

Almost surely, 2^81119396286 is an apocalyptic number.

81119396286 is an abundant number, since it is smaller than the sum of its proper divisors (97926405714).

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

81119396286 is a wasteful number, since it uses less digits than its factorization.

81119396286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250393 (or 250390 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 54.

The spelling of 81119396286 in words is "eighty-one billion, one hundred nineteen million, three hundred ninety-six thousand, two hundred eighty-six".