3813874602521 has 2 divisors, whose sum is σ = 3813874602522. Its totient is φ = 3813874602520.

The previous prime is 3813874602469. The next prime is 3813874602623. The reversal of 3813874602521 is 1252064783183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3572719946896 + 241154655625 = 1890164^2 + 491075^2 .

It is a cyclic number.

It is not a de Polignac number, because 3813874602521 - 2²² = 3813870408217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3813874602521.

It is not a weakly prime, because it can be changed into another prime (3813874604521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1906937301260 + 1906937301261.

It is an arithmetic number, because the mean of its divisors is an integer number (1906937301261).

Almost surely, 2^{3813874602521} is an apocalyptic number.

It is an amenable number.

3813874602521 is a deficient number, since it is larger than the sum of its proper divisors (1).

3813874602521 is an equidigital number, since it uses as much as digits as its factorization.

3813874602521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1935360, while the sum is 50.

The spelling of 3813874602521 in words is "three trillion, eight hundred thirteen billion, eight hundred seventy-four million, six hundred two thousand, five hundred twenty-one".