126871807251 has 16 divisors (see below), whose sum is σ = 193416136704. Its totient is φ = 72465299904.

The previous prime is 126871807247. The next prime is 126871807277. The reversal of 126871807251 is 152708178621.

It is not a de Polignac number, because 126871807251 - 2² = 126871807247 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 126871807251.

It is not an unprimeable number, because it can be changed into a prime (126871807201) 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, 1322370 + ... + 1415063.

It is an arithmetic number, because the mean of its divisors is an integer number (12088508544).

Almost surely, 2^126871807251 is an apocalyptic number.

126871807251 is a deficient number, since it is larger than the sum of its proper divisors (66544329453).

126871807251 is a wasteful number, since it uses less digits than its factorization.

126871807251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2739650.

The product of its (nonzero) digits is 376320, while the sum is 48.

The spelling of 126871807251 in words is "one hundred twenty-six billion, eight hundred seventy-one million, eight hundred seven thousand, two hundred fifty-one".