3155435968397 has 2 divisors, whose sum is σ = 3155435968398. Its totient is φ = 3155435968396.

The previous prime is 3155435968387. The next prime is 3155435968507. The reversal of 3155435968397 is 7938695345513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2241769540516 + 913666427881 = 1497254^2 + 955859^2 .

It is a cyclic number.

It is not a de Polignac number, because 3155435968397 - 2³⁰ = 3154362226573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3155435968327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1577717984198 + 1577717984199.

It is an arithmetic number, because the mean of its divisors is an integer number (1577717984199).

Almost surely, 2^{3155435968397} is an apocalyptic number.

It is an amenable number.

3155435968397 is a deficient number, since it is larger than the sum of its proper divisors (1).

3155435968397 is an equidigital number, since it uses as much as digits as its factorization.

3155435968397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 367416000, while the sum is 68.

The spelling of 3155435968397 in words is "three trillion, one hundred fifty-five billion, four hundred thirty-five million, nine hundred sixty-eight thousand, three hundred ninety-seven".