16348799381 has 2 divisors, whose sum is σ = 16348799382. Its totient is φ = 16348799380.

The previous prime is 16348799359. The next prime is 16348799407. The reversal of 16348799381 is 18399784361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15966596881 + 382202500 = 126359^2 + 19550^2 .

It is a cyclic number.

It is not a de Polignac number, because 16348799381 - 2²² = 16344605077 is a prime.

It is a super-2 number, since 2×16348799381² (a number of 21 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 16348799381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16348799351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8174399690 + 8174399691.

It is an arithmetic number, because the mean of its divisors is an integer number (8174399691).

Almost surely, 2^16348799381 is an apocalyptic number.

It is an amenable number.

16348799381 is a deficient number, since it is larger than the sum of its proper divisors (1).

16348799381 is an equidigital number, since it uses as much as digits as its factorization.

16348799381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7838208, while the sum is 59.

The spelling of 16348799381 in words is "sixteen billion, three hundred forty-eight million, seven hundred ninety-nine thousand, three hundred eighty-one".