126777443903 has 16 divisors (see below), whose sum is σ = 138699412992. Its totient is φ = 114922044000.

The previous prime is 126777443899. The next prime is 126777443929. The reversal of 126777443903 is 309344777621.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 126777443903 - 2² = 126777443899 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126777440903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6125150 + ... + 6145812.

It is an arithmetic number, because the mean of its divisors is an integer number (8668713312).

Almost surely, 2^126777443903 is an apocalyptic number.

126777443903 is a deficient number, since it is larger than the sum of its proper divisors (11921969089).

126777443903 is a wasteful number, since it uses less digits than its factorization.

126777443903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22246.

The product of its (nonzero) digits is 5334336, while the sum is 53.

The spelling of 126777443903 in words is "one hundred twenty-six billion, seven hundred seventy-seven million, four hundred forty-three thousand, nine hundred three".