38722761961 has 9 divisors (see below), whose sum is σ = 41933334981. Its totient is φ = 35741726592.

The previous prime is 38722761901. The next prime is 38722762031. The reversal of 38722761961 is 16916722783.

The square root of 38722761961 is 196781.

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 3054662361 + 35668099600 = 55269^2 + 188860^2 .

It is not a de Polignac number, because 38722761961 - 2¹¹ = 38722759913 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 38722761899 and 38722761908.

It is not an unprimeable number, because it can be changed into a prime (38722761901) 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, 2550585 + ... + 2565721.

Almost surely, 2^38722761961 is an apocalyptic number.

38722761961 is the 196781-st square number.

38722761961 is the 98391-st centered octagonal number.

It is an amenable number.

38722761961 is a deficient number, since it is larger than the sum of its proper divisors (3210573020).

38722761961 is an frugal number, since it uses more digits than its factorization.

38722761961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30300 (or 15150 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 52.

The spelling of 38722761961 in words is "thirty-eight billion, seven hundred twenty-two million, seven hundred sixty-one thousand, nine hundred sixty-one".