37769201649 has 9 divisors (see below), whose sum is σ = 54556355659. Its totient is φ = 25179079080.

The previous prime is 37769201647. The next prime is 37769201663. The reversal of 37769201649 is 94610296773.

It is a happy number.

The square root of 37769201649 is 194343.

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

37769201649 is a `hidden beast` number, since 377 + 6 + 9 + 201 + 64 + 9 = 666.

37769201649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 15143025249 + 22626176400 = 123057^2 + 150420^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 37769201649 - 2¹ = 37769201647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 37769201595 and 37769201604.

It is not an unprimeable number, because it can be changed into a prime (37769201647) 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, 550639 + ... + 615419.

Almost surely, 2^37769201649 is an apocalyptic number.

37769201649 is the 194343-rd square number.

37769201649 is the 97172-nd centered octagonal number.

It is an amenable number.

37769201649 is a deficient number, since it is larger than the sum of its proper divisors (16787154010).

37769201649 is an frugal number, since it uses more digits than its factorization.

37769201649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129568 (or 64784 counting only the distinct ones).

The product of its (nonzero) digits is 3429216, while the sum is 54.

The spelling of 37769201649 in words is "thirty-seven billion, seven hundred sixty-nine million, two hundred one thousand, six hundred forty-nine".