877225179609 has 81 divisors (see below), whose sum is σ = 1363239079839. Its totient is φ = 564434431920.

The previous prime is 877225179587. The next prime is 877225179613. The reversal of 877225179609 is 906971522778.

The square root of 877225179609 is 936603.

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

877225179609 is a `hidden beast` number, since 8 + 7 + 7 + 2 + 2 + 5 + 17 + 9 + 609 = 666.

It can be written as a sum of positive squares in only one way, i.e., 476824775625 + 400400403984 = 690525^2 + 632772^2 .

It is a tau number, because it is divible by the number of its divisors (81).

It is not a de Polignac number, because 877225179609 - 2¹⁷ = 877225048537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (877225179679) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 2351809947 + ... + 2351810319.

Almost surely, 2^877225179609 is an apocalyptic number.

877225179609 is the 936603-rd square number.

877225179609 is the 468302-nd centered octagonal number.

It is an amenable number.

877225179609 is a deficient number, since it is larger than the sum of its proper divisors (486013900230).

877225179609 is an frugal number, since it uses more digits than its factorization.

877225179609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832 (or 407 counting only the distinct ones).

The product of its (nonzero) digits is 26671680, while the sum is 63.

The spelling of 877225179609 in words is "eight hundred seventy-seven billion, two hundred twenty-five million, one hundred seventy-nine thousand, six hundred nine".