810618146649 has 6 divisors (see below), whose sum is σ = 1170892878506. Its totient is φ = 540412097760.

The previous prime is 810618146641. The next prime is 810618146693. The reversal of 810618146649 is 946641816018.

810618146649 is a `hidden beast` number, since 8 + 1 + 0 + 61 + 81 + 466 + 49 = 666.

It can be written as a sum of positive squares in only one way, i.e., 440763210000 + 369854936649 = 663900^2 + 608157^2 .

It is not a de Polignac number, because 810618146649 - 2³ = 810618146641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 810618146595 and 810618146604.

It is not an unprimeable number, because it can be changed into a prime (810618146641) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45034341472 + ... + 45034341489.

Almost surely, 2^810618146649 is an apocalyptic number.

It is an amenable number.

810618146649 is a deficient number, since it is larger than the sum of its proper divisors (360274731857).

810618146649 is a wasteful number, since it uses less digits than its factorization.

810618146649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90068682967 (or 90068682964 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 54.

The spelling of 810618146649 in words is "eight hundred ten billion, six hundred eighteen million, one hundred forty-six thousand, six hundred forty-nine".