126765003905 has 4 divisors (see below), whose sum is σ = 152118004692. Its totient is φ = 101412003120.

The previous prime is 126765003881. The next prime is 126765003917. The reversal of 126765003905 is 509300567621.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15977212801 + 110787791104 = 126401^2 + 332848^2 .

It is a de Polignac number, because none of the positive numbers 2^k-126765003905 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12676500386 + ... + 12676500395.

It is an arithmetic number, because the mean of its divisors is an integer number (38029501173).

Almost surely, 2^126765003905 is an apocalyptic number.

It is an amenable number.

126765003905 is a deficient number, since it is larger than the sum of its proper divisors (25353000787).

126765003905 is an equidigital number, since it uses as much as digits as its factorization.

126765003905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25353000786.

The product of its (nonzero) digits is 340200, while the sum is 44.

The spelling of 126765003905 in words is "one hundred twenty-six billion, seven hundred sixty-five million, three thousand, nine hundred five".