3685769981537 has 4 divisors (see below), whose sum is σ = 4212308550336. Its totient is φ = 3159231412740.

The previous prime is 3685769981533. The next prime is 3685769981561. The reversal of 3685769981537 is 7351899675863.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3685769981537 - 2² = 3685769981533 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3685769981533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263269284389 + ... + 263269284402.

It is an arithmetic number, because the mean of its divisors is an integer number (1053077137584).

Almost surely, 2^{3685769981537} is an apocalyptic number.

It is an amenable number.

3685769981537 is a deficient number, since it is larger than the sum of its proper divisors (526538568799).

3685769981537 is an equidigital number, since it uses as much as digits as its factorization.

3685769981537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526538568798.

The product of its digits is 2057529600, while the sum is 77.

The spelling of 3685769981537 in words is "three trillion, six hundred eighty-five billion, seven hundred sixty-nine million, nine hundred eighty-one thousand, five hundred thirty-seven".