38883501721 has 9 divisors (see below), whose sum is σ = 39074723229. Its totient is φ = 38693214336.

The previous prime is 38883501697. The next prime is 38883501763. The reversal of 38883501721 is 12710538883.

The square root of 38883501721 is 197189.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 5211251721 + 33672250000 = 72189^2 + 183500^2 .

It is not a de Polignac number, because 38883501721 - 2⁵ = 38883501689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38883507721) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 57776041 + ... + 57776713.

Almost surely, 2^38883501721 is an apocalyptic number.

38883501721 is the 197189-th square number.

38883501721 is the 98595-th centered octagonal number.

It is an amenable number.

38883501721 is a deficient number, since it is larger than the sum of its proper divisors (191221508).

38883501721 is an frugal number, since it uses more digits than its factorization.

38883501721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1932 (or 966 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 46.

The spelling of 38883501721 in words is "thirty-eight billion, eight hundred eighty-three million, five hundred one thousand, seven hundred twenty-one".