3642727636381 has 2 divisors, whose sum is σ = 3642727636382. Its totient is φ = 3642727636380.

The previous prime is 3642727636357. The next prime is 3642727636399. The reversal of 3642727636381 is 1836367272463.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2018007760356 + 1624719876025 = 1420566^2 + 1274645^2 .

It is a cyclic number.

It is not a de Polignac number, because 3642727636381 - 2¹⁷ = 3642727505309 is a prime.

It is a super-2 number, since 2×3642727636381² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3642727636351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1821363818190 + 1821363818191.

It is an arithmetic number, because the mean of its divisors is an integer number (1821363818191).

Almost surely, 2^{3642727636381} is an apocalyptic number.

It is an amenable number.

3642727636381 is a deficient number, since it is larger than the sum of its proper divisors (1).

3642727636381 is an equidigital number, since it uses as much as digits as its factorization.

3642727636381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36578304, while the sum is 58.

The spelling of 3642727636381 in words is "three trillion, six hundred forty-two billion, seven hundred twenty-seven million, six hundred thirty-six thousand, three hundred eighty-one".