2649881398 has 8 divisors (see below), whose sum is σ = 4184023320. Its totient is φ = 1255206960.

The previous prime is 2649881369. The next prime is 2649881401. The reversal of 2649881398 is 8931889462.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34866823 + ... + 34866898.

It is an arithmetic number, because the mean of its divisors is an integer number (523002915).

Almost surely, 2^2649881398 is an apocalyptic number.

2649881398 is a deficient number, since it is larger than the sum of its proper divisors (1534141922).

2649881398 is a wasteful number, since it uses less digits than its factorization.

2649881398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69733742.

The product of its digits is 5971968, while the sum is 58.

The square root of 2649881398 is about 51476.9987275871. The cubic root of 2649881398 is about 1383.8068587189.

The spelling of 2649881398 in words is "two billion, six hundred forty-nine million, eight hundred eighty-one thousand, three hundred ninety-eight".