870614661421577 has 4 divisors (see below), whose sum is σ = 870614863446276. Its totient is φ = 870614459396880.

The previous prime is 870614661421553. The next prime is 870614661421597. The reversal of 870614661421577 is 775124166416078.

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 2 ways, for example, as 366939923016976 + 503674738404601 = 19155676^2 + 22442699^2 .

It is a cyclic number.

It is not a de Polignac number, because 870614661421577 - 2¹⁴ = 870614661405193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (870614661421597) 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, 94404074 + ... + 103215107.

It is an arithmetic number, because the mean of its divisors is an integer number (217653715861569).

Almost surely, 2^{870614661421577} is an apocalyptic number.

It is an amenable number.

870614661421577 is a deficient number, since it is larger than the sum of its proper divisors (202024699).

870614661421577 is a wasteful number, since it uses less digits than its factorization.

870614661421577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202024698.

The product of its (nonzero) digits is 94832640, while the sum is 65.

The spelling of 870614661421577 in words is "eight hundred seventy trillion, six hundred fourteen billion, six hundred sixty-one million, four hundred twenty-one thousand, five hundred seventy-seven".