872309445146 has 4 divisors (see below), whose sum is σ = 1308464167722. Its totient is φ = 436154722572.

The previous prime is 872309445127. The next prime is 872309445157. The reversal of 872309445146 is 641544903278.

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

It can be written as a sum of positive squares in only one way, i.e., 872103838225 + 205606921 = 933865^2 + 14339^2 .

It is a super-2 number, since 2×872309445146² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 218077361285 + ... + 218077361288.

It is a 1-persistent number, because it is pandigital, but 2⋅872309445146 = 1744618890292 is not.

Almost surely, 2^872309445146 is an apocalyptic number.

872309445146 is a deficient number, since it is larger than the sum of its proper divisors (436154722576).

872309445146 is a wasteful number, since it uses less digits than its factorization.

872309445146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436154722575.

The product of its (nonzero) digits is 5806080, while the sum is 53.

The spelling of 872309445146 in words is "eight hundred seventy-two billion, three hundred nine million, four hundred forty-five thousand, one hundred forty-six".