2549681651 has 8 divisors (see below), whose sum is σ = 2781966000. Its totient is φ = 2317479840.

The previous prime is 2549681647. The next prime is 2549681669. The reversal of 2549681651 is 1561869452.

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

It is a cyclic number.

It is not a de Polignac number, because 2549681651 - 2² = 2549681647 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2549681596 and 2549681605.

It is not an unprimeable number, because it can be changed into a prime (2549681551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56525 + ... + 91073.

It is an arithmetic number, because the mean of its divisors is an integer number (347745750).

Almost surely, 2^2549681651 is an apocalyptic number.

2549681651 is a deficient number, since it is larger than the sum of its proper divisors (232284349).

2549681651 is a wasteful number, since it uses less digits than its factorization.

2549681651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41269.

The product of its digits is 518400, while the sum is 47.

The square root of 2549681651 is about 50494.3724686227. The cubic root of 2549681651 is about 1366.1403524112.

The spelling of 2549681651 in words is "two billion, five hundred forty-nine million, six hundred eighty-one thousand, six hundred fifty-one".