2649781351 has 8 divisors (see below), whose sum is σ = 3028634144. Its totient is φ = 2271006720.

The previous prime is 2649781349. The next prime is 2649781367. The reversal of 2649781351 is 1531879462.

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 2649781351 - 2¹ = 2649781349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2649781331) 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, 113671 + ... + 134983.

It is an arithmetic number, because the mean of its divisors is an integer number (378579268).

Almost surely, 2^2649781351 is an apocalyptic number.

2649781351 is a deficient number, since it is larger than the sum of its proper divisors (378852793).

2649781351 is a wasteful number, since it uses less digits than its factorization.

2649781351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39081.

The product of its digits is 362880, while the sum is 46.

The square root of 2649781351 is about 51476.0269543017. The cubic root of 2649781351 is about 1383.7894431637.

The spelling of 2649781351 in words is "two billion, six hundred forty-nine million, seven hundred eighty-one thousand, three hundred fifty-one".