423400255415491 has 2 divisors, whose sum is σ = 423400255415492. Its totient is φ = 423400255415490.

The previous prime is 423400255415419. The next prime is 423400255415507. The reversal of 423400255415491 is 194514552004324.

It is a happy number.

Together with previous prime (423400255415419) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 423400255415491 - 2⁷ = 423400255415363 is a prime.

It is not a weakly prime, because it can be changed into another prime (423400255415411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211700127707745 + 211700127707746.

It is an arithmetic number, because the mean of its divisors is an integer number (211700127707746).

Almost surely, 2^{423400255415491} is an apocalyptic number.

423400255415491 is a deficient number, since it is larger than the sum of its proper divisors (1).

423400255415491 is an equidigital number, since it uses as much as digits as its factorization.

423400255415491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456000, while the sum is 49.

The spelling of 423400255415491 in words is "four hundred twenty-three trillion, four hundred billion, two hundred fifty-five million, four hundred fifteen thousand, four hundred ninety-one".