870742321191 has 12 divisors (see below), whose sum is σ = 1257785813232. Its totient is φ = 580473232416.

The previous prime is 870742321187. The next prime is 870742321247. The reversal of 870742321191 is 191123247078.

870742321191 is a `hidden beast` number, since 8 + 7 + 0 + 7 + 423 + 211 + 9 + 1 = 666.

It is not a de Polignac number, because 870742321191 - 2² = 870742321187 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870742321121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1547371 + ... + 2033676.

It is an arithmetic number, because the mean of its divisors is an integer number (104815484436).

Almost surely, 2^870742321191 is an apocalyptic number.

870742321191 is a deficient number, since it is larger than the sum of its proper divisors (387043492041).

870742321191 is a wasteful number, since it uses less digits than its factorization.

870742321191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3608070 (or 3608067 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The spelling of 870742321191 in words is "eight hundred seventy billion, seven hundred forty-two million, three hundred twenty-one thousand, one hundred ninety-one".