872544661241 has 4 divisors (see below), whose sum is σ = 951866903184. Its totient is φ = 793222419300.

The previous prime is 872544661229. The next prime is 872544661253. The reversal of 872544661241 is 142166445278.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (872544661229) and next prime (872544661253).

It is a cyclic number.

It is not a de Polignac number, because 872544661241 - 2¹⁰ = 872544660217 is a prime.

It is a super-2 number, since 2×872544661241² (a number of 25 digits) contains 22 as substring.

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 872544661241.

It is not an unprimeable number, because it can be changed into a prime (872544661271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39661120955 + ... + 39661120976.

It is an arithmetic number, because the mean of its divisors is an integer number (237966725796).

Almost surely, 2^872544661241 is an apocalyptic number.

It is an amenable number.

872544661241 is a deficient number, since it is larger than the sum of its proper divisors (79322241943).

872544661241 is a wasteful number, since it uses less digits than its factorization.

872544661241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79322241942.

The product of its digits is 2580480, while the sum is 50.

The spelling of 872544661241 in words is "eight hundred seventy-two billion, five hundred forty-four million, six hundred sixty-one thousand, two hundred forty-one".