872148804820891 has 16 divisors (see below), whose sum is σ = 941862631723776. Its totient is φ = 802812952637856.

The previous prime is 872148804820873. The next prime is 872148804820919. The reversal of 872148804820891 is 198028408841278.

It is a cyclic number.

It is not a de Polignac number, because 872148804820891 - 2²¹ = 872148802723739 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 872148804820891.

It is not an unprimeable number, because it can be changed into a prime (872148804820831) 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, 53416965 + ... + 67806118.

It is an arithmetic number, because the mean of its divisors is an integer number (58866414482736).

Almost surely, 2^{872148804820891} is an apocalyptic number.

872148804820891 is a deficient number, since it is larger than the sum of its proper divisors (69713826902885).

872148804820891 is a wasteful number, since it uses less digits than its factorization.

872148804820891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121224642.

The product of its (nonzero) digits is 132120576, while the sum is 70.

The spelling of 872148804820891 in words is "eight hundred seventy-two trillion, one hundred forty-eight billion, eight hundred four million, eight hundred twenty thousand, eight hundred ninety-one".