81230961698304 has 160 divisors (see below), whose sum is σ = 236209678505856. Its totient is φ = 24601659064320.

The previous prime is 81230961698281. The next prime is 81230961698377. The reversal of 81230961698304 is 40389616903218.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28847964 + ... + 31538340.

Almost surely, 2^{81230961698304} 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 81230961698304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118104839252928).

81230961698304 is an abundant number, since it is smaller than the sum of its proper divisors (154978716807552).

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

81230961698304 is a wasteful number, since it uses less digits than its factorization.

81230961698304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2692196 (or 2692180 counting only the distinct ones).

The product of its (nonzero) digits is 13436928, while the sum is 60.

The spelling of 81230961698304 in words is "eighty-one trillion, two hundred thirty billion, nine hundred sixty-one million, six hundred ninety-eight thousand, three hundred four".