870005773081 has 9 divisors (see below), whose sum is σ = 871883691861. Its totient is φ = 868131896412.

The previous prime is 870005773079. The next prime is 870005773139. The reversal of 870005773081 is 180377500078.

It is a happy number.

The square root of 870005773081 is 932741.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 870005773081 - 2¹ = 870005773079 is a prime.

It is a super-2 number, since 2×870005773081² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (870005773381) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 678102066 + ... + 678103348.

Almost surely, 2^870005773081 is an apocalyptic number.

870005773081 is the 932741-st square number.

870005773081 is the 466371-st centered octagonal number.

It is an amenable number.

870005773081 is a deficient number, since it is larger than the sum of its proper divisors (1877918780).

870005773081 is an frugal number, since it uses more digits than its factorization.

870005773081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4020 (or 2010 counting only the distinct ones).

The product of its (nonzero) digits is 329280, while the sum is 46.

The spelling of 870005773081 in words is "eight hundred seventy billion, five million, seven hundred seventy-three thousand, eighty-one".