2649256698 has 16 divisors (see below), whose sum is σ = 5780196576. Its totient is φ = 802805040.

The previous prime is 2649256669. The next prime is 2649256699. The reversal of 2649256698 is 8966529462.

It is a happy number.

It is a super-2 number, since 2×2649256698² = 14037122103795726408, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2649256699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20070061 + ... + 20070192.

It is an arithmetic number, because the mean of its divisors is an integer number (361262286).

Almost surely, 2^2649256698 is an apocalyptic number.

2649256698 is an abundant number, since it is smaller than the sum of its proper divisors (3130939878).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2649256698 is a wasteful number, since it uses less digits than its factorization.

2649256698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40140269.

The product of its digits is 11197440, while the sum is 57.

The square root of 2649256698 is about 51470.9306113655. The cubic root of 2649256698 is about 1383.6981076775.

The spelling of 2649256698 in words is "two billion, six hundred forty-nine million, two hundred fifty-six thousand, six hundred ninety-eight".