81174402038 has 8 divisors (see below), whose sum is σ = 125689396800. Its totient is φ = 39277936440.

The previous prime is 81174402017. The next prime is 81174402047. The reversal of 81174402038 is 83020447118.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 81174401992 and 81174402010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 654632213 + ... + 654632336.

It is an arithmetic number, because the mean of its divisors is an integer number (15711174600).

Almost surely, 2^81174402038 is an apocalyptic number.

81174402038 is a deficient number, since it is larger than the sum of its proper divisors (44514994762).

81174402038 is a wasteful number, since it uses less digits than its factorization.

81174402038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1309264582.

The product of its (nonzero) digits is 43008, while the sum is 38.

The spelling of 81174402038 in words is "eighty-one billion, one hundred seventy-four million, four hundred two thousand, thirty-eight".