319541953981 has 2 divisors, whose sum is σ = 319541953982. Its totient is φ = 319541953980.

The previous prime is 319541953961. The next prime is 319541954033. The reversal of 319541953981 is 189359145913.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 302313028900 + 17228925081 = 549830^2 + 131259^2 .

It is a cyclic number.

It is not a de Polignac number, because 319541953981 - 2⁵ = 319541953949 is a prime.

It is a super-2 number, since 2×319541953981² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (319541953961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159770976990 + 159770976991.

It is an arithmetic number, because the mean of its divisors is an integer number (159770976991).

Almost surely, 2^319541953981 is an apocalyptic number.

It is an amenable number.

319541953981 is a deficient number, since it is larger than the sum of its proper divisors (1).

319541953981 is an equidigital number, since it uses as much as digits as its factorization.

319541953981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5248800, while the sum is 58.

The spelling of 319541953981 in words is "three hundred nineteen billion, five hundred forty-one million, nine hundred fifty-three thousand, nine hundred eighty-one".