3679561549981 has 4 divisors (see below), whose sum is σ = 3690678050464. Its totient is φ = 3668445049500.

The previous prime is 3679561549921. The next prime is 3679561550029. The reversal of 3679561549981 is 1899451659763.

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 3679561549981 - 2²³ = 3679553161373 is a prime.

It is a super-2 number, since 2×3679561549981² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3679561549921) 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, 5558249745 + ... + 5558250406.

It is an arithmetic number, because the mean of its divisors is an integer number (922669512616).

Almost surely, 2^{3679561549981} is an apocalyptic number.

It is an amenable number.

3679561549981 is a deficient number, since it is larger than the sum of its proper divisors (11116500483).

3679561549981 is a wasteful number, since it uses less digits than its factorization.

3679561549981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11116500482.

The product of its digits is 440899200, while the sum is 73.

The spelling of 3679561549981 in words is "three trillion, six hundred seventy-nine billion, five hundred sixty-one million, five hundred forty-nine thousand, nine hundred eighty-one".