126287604813 has 4 divisors (see below), whose sum is σ = 168383473088. Its totient is φ = 84191736540.

The previous prime is 126287604787. The next prime is 126287604827. The reversal of 126287604813 is 318406782621.

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, and also an emirpimes, since its reverse is a distinct semiprime: 318406782621 = 3 ⋅106135594207.

It is a de Polignac number, because none of the positive numbers 2^k-126287604813 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 (126287604413) 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, 21047934133 + ... + 21047934138.

It is an arithmetic number, because the mean of its divisors is an integer number (42095868272).

Almost surely, 2^126287604813 is an apocalyptic number.

It is an amenable number.

126287604813 is a deficient number, since it is larger than the sum of its proper divisors (42095868275).

126287604813 is an equidigital number, since it uses as much as digits as its factorization.

126287604813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42095868274.

The product of its (nonzero) digits is 774144, while the sum is 48.

The spelling of 126287604813 in words is "one hundred twenty-six billion, two hundred eighty-seven million, six hundred four thousand, eight hundred thirteen".