3998264188357 has 2 divisors, whose sum is σ = 3998264188358. Its totient is φ = 3998264188356.

The previous prime is 3998264188351. The next prime is 3998264188417. The reversal of 3998264188357 is 7538814628993.

It is a Cunningham number, because it is equal to 1999566²+1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3998264188356 + 1 = 1999566^2 + 1^2 .

It is an emirp because it is prime and its reverse (7538814628993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3998264188357 - 2²³ = 3998255799749 is a prime.

It is a super-2 number, since 2×3998264188357² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3998264188357.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3998264188351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1999132094178 + 1999132094179.

It is an arithmetic number, because the mean of its divisors is an integer number (1999132094179).

Almost surely, 2^{3998264188357} is an apocalyptic number.

It is an amenable number.

3998264188357 is a deficient number, since it is larger than the sum of its proper divisors (1).

3998264188357 is an equidigital number, since it uses as much as digits as its factorization.

3998264188357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 627056640, while the sum is 73.

The spelling of 3998264188357 in words is "three trillion, nine hundred ninety-eight billion, two hundred sixty-four million, one hundred eighty-eight thousand, three hundred fifty-seven".