38907565290649 has 12 divisors (see below), whose sum is σ = 43809244051860. Its totient is φ = 34507818435200.

The previous prime is 38907565290647. The next prime is 38907565290701. The reversal of 38907565290649 is 94609256570983.

It can be written as a sum of positive squares in 2 ways, for example, as 16756799559049 + 22150765731600 = 4093507^2 + 4706460^2 .

It is not a de Polignac number, because 38907565290649 - 2¹ = 38907565290647 is a prime.

It is a super-2 number, since 2×38907565290649² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38907565290647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3921338044 + ... + 3921347965.

It is an arithmetic number, because the mean of its divisors is an integer number (3650770337655).

Almost surely, 2^{38907565290649} is an apocalyptic number.

It is an amenable number.

38907565290649 is a deficient number, since it is larger than the sum of its proper divisors (4901678761211).

38907565290649 is a wasteful number, since it uses less digits than its factorization.

38907565290649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7842686072 (or 7842686061 counting only the distinct ones).

The product of its (nonzero) digits is 881798400, while the sum is 73.

The spelling of 38907565290649 in words is "thirty-eight trillion, nine hundred seven billion, five hundred sixty-five million, two hundred ninety thousand, six hundred forty-nine".