402268678541 has 2 divisors, whose sum is σ = 402268678542. Its totient is φ = 402268678540.

The previous prime is 402268678529. The next prime is 402268678549. The reversal of 402268678541 is 145876862204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 279666457225 + 122602221316 = 528835^2 + 350146^2 .

It is a cyclic number.

It is not a de Polignac number, because 402268678541 - 2⁶ = 402268678477 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402268678549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201134339270 + 201134339271.

It is an arithmetic number, because the mean of its divisors is an integer number (201134339271).

Almost surely, 2^402268678541 is an apocalyptic number.

It is an amenable number.

402268678541 is a deficient number, since it is larger than the sum of its proper divisors (1).

402268678541 is an equidigital number, since it uses as much as digits as its factorization.

402268678541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5160960, while the sum is 53.

The spelling of 402268678541 in words is "four hundred two billion, two hundred sixty-eight million, six hundred seventy-eight thousand, five hundred forty-one".