649810143 has 12 divisors (see below), whose sum is σ = 942186960. Its totient is φ = 431558016.

The previous prime is 649810141. The next prime is 649810151. The reversal of 649810143 is 341018946.

649810143 is a `hidden beast` number, since 649 + 8 + 1 + 0 + 1 + 4 + 3 = 666.

It is not a de Polignac number, because 649810143 - 2¹ = 649810141 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 649810098 and 649810107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649810141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 134898 + ... + 139631.

It is an arithmetic number, because the mean of its divisors is an integer number (78515580).

Almost surely, 2^649810143 is an apocalyptic number.

649810143 is a deficient number, since it is larger than the sum of its proper divisors (292376817).

649810143 is a wasteful number, since it uses less digits than its factorization.

649810143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274798 (or 274795 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 649810143 is about 25491.3738939273. The cubic root of 649810143 is about 866.1547578677.

It can be divided in two parts, 6498 and 10143, that added together give a square (16641 = 129²).

The spelling of 649810143 in words is "six hundred forty-nine million, eight hundred ten thousand, one hundred forty-three".