38721081033812 has 6 divisors (see below), whose sum is σ = 67761891809178. Its totient is φ = 19360540516904.

The previous prime is 38721081033781. The next prime is 38721081033823. The reversal of 38721081033812 is 21833018012783.

It can be written as a sum of positive squares in only one way, i.e., 22721753026756 + 15999328007056 = 4766734^2 + 3999916^2 .

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, 4840135129223 + ... + 4840135129230.

It is an arithmetic number, because the mean of its divisors is an integer number (11293648634863).

Almost surely, 2^{38721081033812} is an apocalyptic number.

It is an amenable number.

38721081033812 is a deficient number, since it is larger than the sum of its proper divisors (29040810775366).

38721081033812 is a wasteful number, since it uses less digits than its factorization.

38721081033812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9680270258457 (or 9680270258455 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 47.

The spelling of 38721081033812 in words is "thirty-eight trillion, seven hundred twenty-one billion, eighty-one million, thirty-three thousand, eight hundred twelve".