3655538137969 has 4 divisors (see below), whose sum is σ = 3658078471680. Its totient is φ = 3652997804260.

The previous prime is 3655538137967. The next prime is 3655538137973. The reversal of 3655538137969 is 9697318355563.

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 3655538137969 - 2¹ = 3655538137967 is a prime.

It is a super-2 number, since 2×3655538137969² (a number of 26 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 = 3655538137898 and 3655538137907.

It is not an unprimeable number, because it can be changed into a prime (3655538137967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1270164697 + ... + 1270167574.

It is an arithmetic number, because the mean of its divisors is an integer number (914519617920).

Almost surely, 2^{3655538137969} is an apocalyptic number.

It is an amenable number.

3655538137969 is a deficient number, since it is larger than the sum of its proper divisors (2540333711).

3655538137969 is a wasteful number, since it uses less digits than its factorization.

3655538137969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2540333710.

The product of its digits is 551124000, while the sum is 70.

The spelling of 3655538137969 in words is "three trillion, six hundred fifty-five billion, five hundred thirty-eight million, one hundred thirty-seven thousand, nine hundred sixty-nine".