80994661809600 has 2688 divisors, whose sum is σ = 358024774090752. Its totient is φ = 15534371635200.

The previous prime is 80994661809539. The next prime is 80994661809617. The reversal of 80994661809600 is 690816649908.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 29166243412 + ... + 29166246188.

Almost surely, 2^{80994661809600} is an apocalyptic number.

80994661809600 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80994661809600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179012387045376).

80994661809600 is an abundant number, since it is smaller than the sum of its proper divisors (277030112281152).

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

80994661809600 is a wasteful number, since it uses less digits than its factorization.

80994661809600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2963 (or 2948 counting only the distinct ones).

The product of its (nonzero) digits is 40310784, while the sum is 66.

The spelling of 80994661809600 in words is "eighty trillion, nine hundred ninety-four billion, six hundred sixty-one million, eight hundred nine thousand, six hundred".