126426640393 has 4 divisors (see below), whose sum is σ = 129116568960. Its totient is φ = 123736711828.

The previous prime is 126426640363. The next prime is 126426640411. The reversal of 126426640393 is 393046624621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 126426640393 - 2²¹ = 126424543241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126426640303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1344964213 + ... + 1344964306.

It is an arithmetic number, because the mean of its divisors is an integer number (32279142240).

Almost surely, 2^126426640393 is an apocalyptic number.

It is an amenable number.

126426640393 is a deficient number, since it is larger than the sum of its proper divisors (2689928567).

126426640393 is an equidigital number, since it uses as much as digits as its factorization.

126426640393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2689928566.

The product of its (nonzero) digits is 1119744, while the sum is 46.

The spelling of 126426640393 in words is "one hundred twenty-six billion, four hundred twenty-six million, six hundred forty thousand, three hundred ninety-three".