816325861 has 8 divisors (see below), whose sum is σ = 925389920. Its totient is φ = 713871792.

The previous prime is 816325849. The next prime is 816325879. The reversal of 816325861 is 168523618.

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

It is a cyclic number.

It is not a de Polignac number, because 816325861 - 2¹³ = 816317669 is a prime.

It is a super-2 number, since 2×816325861² = 1332775822674782642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816325061) 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, 1652235 + ... + 1652728.

It is an arithmetic number, because the mean of its divisors is an integer number (115673740).

Almost surely, 2^816325861 is an apocalyptic number.

It is an amenable number.

816325861 is a deficient number, since it is larger than the sum of its proper divisors (109064059).

816325861 is a wasteful number, since it uses less digits than its factorization.

816325861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3304995.

The product of its digits is 69120, while the sum is 40.

The square root of 816325861 is about 28571.4168532119. The cubic root of 816325861 is about 934.5901187992.

The spelling of 816325861 in words is "eight hundred sixteen million, three hundred twenty-five thousand, eight hundred sixty-one".