126857045989 has 4 divisors (see below), whose sum is σ = 133533732640. Its totient is φ = 120180359340.

The previous prime is 126857045981. The next prime is 126857046011. The reversal of 126857045989 is 989540758621.

It is a happy number.

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 126857045989 - 2³ = 126857045981 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 126857045989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126857045981) 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, 3338343297 + ... + 3338343334.

It is an arithmetic number, because the mean of its divisors is an integer number (33383433160).

Almost surely, 2^126857045989 is an apocalyptic number.

126857045989 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

126857045989 is a deficient number, since it is larger than the sum of its proper divisors (6676686651).

126857045989 is an equidigital number, since it uses as much as digits as its factorization.

126857045989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6676686650.

The product of its (nonzero) digits is 43545600, while the sum is 64.

The spelling of 126857045989 in words is "one hundred twenty-six billion, eight hundred fifty-seven million, forty-five thousand, nine hundred eighty-nine".