814195851987 has 8 divisors (see below), whose sum is σ = 1240679393536. Its totient is φ = 465254772552.

The previous prime is 814195851971. The next prime is 814195852003. The reversal of 814195851987 is 789158591418.

It is an interprime number because it is at equal distance from previous prime (814195851971) and next prime (814195852003).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 814195851987 - 2⁴ = 814195851971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (814195811987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19385615503 + ... + 19385615544.

It is an arithmetic number, because the mean of its divisors is an integer number (155084924192).

Almost surely, 2^814195851987 is an apocalyptic number.

814195851987 is a deficient number, since it is larger than the sum of its proper divisors (426483541549).

814195851987 is a wasteful number, since it uses less digits than its factorization.

814195851987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38771231057.

The product of its digits is 29030400, while the sum is 66.

The spelling of 814195851987 in words is "eight hundred fourteen billion, one hundred ninety-five million, eight hundred fifty-one thousand, nine hundred eighty-seven".