38865872061 has 10 divisors (see below), whose sum is σ = 58058895422. Its totient is φ = 25910581320.

The previous prime is 38865872057. The next prime is 38865872093. The reversal of 38865872061 is 16027856883.

38865872061 is a `hidden beast` number, since 38 + 8 + 6 + 587 + 20 + 6 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 38795211225 + 70660836 = 196965^2 + 8406^2 .

It is not a de Polignac number, because 38865872061 - 2² = 38865872057 is a prime.

It is a super-2 number, since 2×38865872061² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 38865871989 and 38865872007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38865872011) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 239912710 + ... + 239912871.

Almost surely, 2^38865872061 is an apocalyptic number.

It is an amenable number.

38865872061 is a deficient number, since it is larger than the sum of its proper divisors (19193023361).

38865872061 is an equidigital number, since it uses as much as digits as its factorization.

38865872061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479825593 (or 479825584 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The spelling of 38865872061 in words is "thirty-eight billion, eight hundred sixty-five million, eight hundred seventy-two thousand, sixty-one".