634534323435491 has 2 divisors, whose sum is σ = 634534323435492. Its totient is φ = 634534323435490.

The previous prime is 634534323435421. The next prime is 634534323435503. The reversal of 634534323435491 is 194534323435436.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 634534323435491 - 2²⁶ = 634534256326627 is a prime.

It is a super-2 number, since 2×634534323435491² (a number of 30 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 634534323435491.

It is not a weakly prime, because it can be changed into another prime (634534323435421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317267161717745 + 317267161717746.

It is an arithmetic number, because the mean of its divisors is an integer number (317267161717746).

Almost surely, 2^{634534323435491} is an apocalyptic number.

634534323435491 is a deficient number, since it is larger than the sum of its proper divisors (1).

634534323435491 is an equidigital number, since it uses as much as digits as its factorization.

634534323435491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 167961600, while the sum is 59.

The spelling of 634534323435491 in words is "six hundred thirty-four trillion, five hundred thirty-four billion, three hundred twenty-three million, four hundred thirty-five thousand, four hundred ninety-one".