126744781099 has 4 divisors (see below), whose sum is σ = 126745963920. Its totient is φ = 126743598280.

The previous prime is 126744781091. The next prime is 126744781127. The reversal of 126744781099 is 990187447621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 126744781099 - 2³ = 126744781091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126744781091) 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, 412672 + ... + 650989.

It is an arithmetic number, because the mean of its divisors is an integer number (31686490980).

Almost surely, 2^126744781099 is an apocalyptic number.

126744781099 is a deficient number, since it is larger than the sum of its proper divisors (1182821).

126744781099 is a wasteful number, since it uses less digits than its factorization.

126744781099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1182820.

The product of its (nonzero) digits is 6096384, while the sum is 58.

The spelling of 126744781099 in words is "one hundred twenty-six billion, seven hundred forty-four million, seven hundred eighty-one thousand, ninety-nine".