872575433661 has 4 divisors (see below), whose sum is σ = 1163433911552. Its totient is φ = 581716955772.

The previous prime is 872575433651. The next prime is 872575433677. The reversal of 872575433661 is 166334575278.

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 not a de Polignac number, because 872575433661 - 2⁷ = 872575433533 is a prime.

It is a super-2 number, since 2×872575433661² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (872575433621) 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 3 ways as a sum of consecutive naturals, for example, 145429238941 + ... + 145429238946.

It is an arithmetic number, because the mean of its divisors is an integer number (290858477888).

Almost surely, 2^872575433661 is an apocalyptic number.

It is an amenable number.

872575433661 is a deficient number, since it is larger than the sum of its proper divisors (290858477891).

872575433661 is a wasteful number, since it uses less digits than its factorization.

872575433661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290858477890.

The product of its digits is 25401600, while the sum is 57.

The spelling of 872575433661 in words is "eight hundred seventy-two billion, five hundred seventy-five million, four hundred thirty-three thousand, six hundred sixty-one".