80865561492 has 96 divisors (see below), whose sum is σ = 215596362240. Its totient is φ = 26192730240.

The previous prime is 80865561487. The next prime is 80865561521. The reversal of 80865561492 is 29416556808.

80865561492 is a `hidden beast` number, since 8 + 0 + 86 + 556 + 1 + 4 + 9 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3172117 + ... + 3197507.

It is an arithmetic number, because the mean of its divisors is an integer number (2245795440).

Almost surely, 2^80865561492 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80865561492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107798181120).

80865561492 is an abundant number, since it is smaller than the sum of its proper divisors (134730800748).

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

80865561492 is a wasteful number, since it uses less digits than its factorization.

80865561492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26238 (or 26230 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 54.

The spelling of 80865561492 in words is "eighty billion, eight hundred sixty-five million, five hundred sixty-one thousand, four hundred ninety-two".