872580781426 has 4 divisors (see below), whose sum is σ = 1308871172142. Its totient is φ = 436290390712.

The previous prime is 872580781411. The next prime is 872580781439. The reversal of 872580781426 is 624187085278.

It is a happy number.

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., 843273053401 + 29307728025 = 918299^2 + 171195^2 .

It is a super-2 number, since 2×872580781426² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 218145195355 + ... + 218145195358.

Almost surely, 2^872580781426 is an apocalyptic number.

872580781426 is a deficient number, since it is larger than the sum of its proper divisors (436290390716).

872580781426 is a wasteful number, since it uses less digits than its factorization.

872580781426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436290390715.

The product of its (nonzero) digits is 12042240, while the sum is 58.

The spelling of 872580781426 in words is "eight hundred seventy-two billion, five hundred eighty million, seven hundred eighty-one thousand, four hundred twenty-six".