871403726772 has 36 divisors (see below), whose sum is σ = 2202885948900. Its totient is φ = 290445363072.

The previous prime is 871403726761. The next prime is 871403726773. The reversal of 871403726772 is 277627304178.

871403726772 is a `hidden beast` number, since 8 + 7 + 140 + 372 + 67 + 72 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 254494016676 + 616909710096 = 504474^2 + 785436^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871403726773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 465897 + ... + 1399952.

Almost surely, 2^871403726772 is an apocalyptic number.

It is an amenable number.

871403726772 is an abundant number, since it is smaller than the sum of its proper divisors (1331482222128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

871403726772 is a wasteful number, since it uses less digits than its factorization.

871403726772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1878832 (or 1878827 counting only the distinct ones).

The product of its (nonzero) digits is 5531904, while the sum is 54.

The spelling of 871403726772 in words is "eight hundred seventy-one billion, four hundred three million, seven hundred twenty-six thousand, seven hundred seventy-two".