3649572536181 has 16 divisors (see below), whose sum is σ = 5716812924480. Its totient is φ = 2041718901120.

The previous prime is 3649572536149. The next prime is 3649572536189. The reversal of 3649572536181 is 1816352759463.

It is a happy number.

It is not a de Polignac number, because 3649572536181 - 2⁵ = 3649572536149 is a prime.

It is a super-2 number, since 2×3649572536181² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3649572536189) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4253580616 + ... + 4253581473.

It is an arithmetic number, because the mean of its divisors is an integer number (357300807780).

Almost surely, 2^{3649572536181} is an apocalyptic number.

It is an amenable number.

3649572536181 is a deficient number, since it is larger than the sum of its proper divisors (2067240388299).

3649572536181 is a wasteful number, since it uses less digits than its factorization.

3649572536181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8507162116.

The product of its digits is 32659200, while the sum is 60.

The spelling of 3649572536181 in words is "three trillion, six hundred forty-nine billion, five hundred seventy-two million, five hundred thirty-six thousand, one hundred eighty-one".