2686598649 has 24 divisors (see below), whose sum is σ = 4459815360. Its totient is φ = 1526616288.

The previous prime is 2686598641. The next prime is 2686598653. The reversal of 2686598649 is 9468956862.

It is not a de Polignac number, because 2686598649 - 2³ = 2686598641 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2686598641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 107842 + ... + 130395.

It is an arithmetic number, because the mean of its divisors is an integer number (185825640).

Almost surely, 2^2686598649 is an apocalyptic number.

It is an amenable number.

2686598649 is a deficient number, since it is larger than the sum of its proper divisors (1773216711).

2686598649 is a wasteful number, since it uses less digits than its factorization.

2686598649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238429 (or 238426 counting only the distinct ones).

The product of its digits is 44789760, while the sum is 63.

The square root of 2686598649 is about 51832.4092532848. The cubic root of 2686598649 is about 1390.1689922721.

The spelling of 2686598649 in words is "two billion, six hundred eighty-six million, five hundred ninety-eight thousand, six hundred forty-nine".