81401032294 has 4 divisors (see below), whose sum is σ = 122101548444. Its totient is φ = 40700516146.

The previous prime is 81401032261. The next prime is 81401032301. The reversal of 81401032294 is 49223010418.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×81401032294² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20350258072 + ... + 20350258075.

It is an arithmetic number, because the mean of its divisors is an integer number (30525387111).

Almost surely, 2^81401032294 is an apocalyptic number.

81401032294 is a deficient number, since it is larger than the sum of its proper divisors (40700516150).

81401032294 is a wasteful number, since it uses less digits than its factorization.

81401032294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40700516149.

The product of its (nonzero) digits is 13824, while the sum is 34.

The spelling of 81401032294 in words is "eighty-one billion, four hundred one million, thirty-two thousand, two hundred ninety-four".