816377631 has 8 divisors (see below), whose sum is σ = 1106952960. Its totient is φ = 535027032.

The previous prime is 816377599. The next prime is 816377641. The reversal of 816377631 is 136773618.

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

It is not a de Polignac number, because 816377631 - 2⁵ = 816377599 is a prime.

It is a super-2 number, since 2×816377631² = 1332944872794344322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816377641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2305975 + ... + 2306328.

It is an arithmetic number, because the mean of its divisors is an integer number (138369120).

Almost surely, 2^816377631 is an apocalyptic number.

816377631 is a deficient number, since it is larger than the sum of its proper divisors (290575329).

816377631 is a wasteful number, since it uses less digits than its factorization.

816377631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4612365.

The product of its digits is 127008, while the sum is 42.

The square root of 816377631 is about 28572.3228142201. The cubic root of 816377631 is about 934.6098750877.

The spelling of 816377631 in words is "eight hundred sixteen million, three hundred seventy-seven thousand, six hundred thirty-one".