851407081 has 8 divisors (see below), whose sum is σ = 1024249280. Its totient is φ = 691368048.

The previous prime is 851407057. The next prime is 851407099. The reversal of 851407081 is 180704158.

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

It is not a de Polignac number, because 851407081 - 2⁵ = 851407049 is a prime.

It is a super-2 number, since 2×851407081² = 1449788035153881122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (851407001) 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, 3200646 + ... + 3200911.

It is an arithmetic number, because the mean of its divisors is an integer number (128031160).

Almost surely, 2^851407081 is an apocalyptic number.

It is an amenable number.

851407081 is a deficient number, since it is larger than the sum of its proper divisors (172842199).

851407081 is a wasteful number, since it uses less digits than its factorization.

851407081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6401583.

The product of its (nonzero) digits is 8960, while the sum is 34.

The square root of 851407081 is about 29178.8807359021. The cubic root of 851407081 is about 947.7906482972.

The spelling of 851407081 in words is "eight hundred fifty-one million, four hundred seven thousand, eighty-one".