3981501619213 has 2 divisors, whose sum is σ = 3981501619214. Its totient is φ = 3981501619212.

The previous prime is 3981501619189. The next prime is 3981501619261. The reversal of 3981501619213 is 3129161051893.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3052941969289 + 928559649924 = 1747267^2 + 963618^2 .

It is a cyclic number.

It is not a de Polignac number, because 3981501619213 - 2²¹ = 3981499522061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3981501679213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1990750809606 + 1990750809607.

It is an arithmetic number, because the mean of its divisors is an integer number (1990750809607).

Almost surely, 2^{3981501619213} is an apocalyptic number.

It is an amenable number.

3981501619213 is a deficient number, since it is larger than the sum of its proper divisors (1).

3981501619213 is an equidigital number, since it uses as much as digits as its factorization.

3981501619213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 349920, while the sum is 49.

The spelling of 3981501619213 in words is "three trillion, nine hundred eighty-one billion, five hundred one million, six hundred nineteen thousand, two hundred thirteen".