810381377 has 8 divisors (see below), whose sum is σ = 873597480. Its totient is φ = 747290880.

The previous prime is 810381353. The next prime is 810381389. The reversal of 810381377 is 773183018.

It can be written as a sum of positive squares in 4 ways, for example, as 45914176 + 764467201 = 6776^2 + 27649^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-810381377 is a prime.

It is a super-2 number, since 2×810381377² = 1313435952376832258, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 810381377.

It is not an unprimeable number, because it can be changed into a prime (810381337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17774 + ... + 44007.

It is an arithmetic number, because the mean of its divisors is an integer number (109199685).

Almost surely, 2^810381377 is an apocalyptic number.

It is an amenable number.

810381377 is a deficient number, since it is larger than the sum of its proper divisors (63216103).

810381377 is a wasteful number, since it uses less digits than its factorization.

810381377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62803.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 810381377 is about 28467.1982639669. The cubic root of 810381377 is about 932.3160284622.

The spelling of 810381377 in words is "eight hundred ten million, three hundred eighty-one thousand, three hundred seventy-seven".