42694465391 has 2 divisors, whose sum is σ = 42694465392. Its totient is φ = 42694465390.

The previous prime is 42694465361. The next prime is 42694465393. The reversal of 42694465391 is 19356449624.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42694465391 - 2³⁰ = 41620723567 is a prime.

Together with 42694465393, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42694465393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21347232695 + 21347232696.

It is an arithmetic number, because the mean of its divisors is an integer number (21347232696).

Almost surely, 2^42694465391 is an apocalyptic number.

42694465391 is a deficient number, since it is larger than the sum of its proper divisors (1).

42694465391 is an equidigital number, since it uses as much as digits as its factorization.

42694465391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5598720, while the sum is 53.

The spelling of 42694465391 in words is "forty-two billion, six hundred ninety-four million, four hundred sixty-five thousand, three hundred ninety-one".