2645401406 has 8 divisors (see below), whose sum is σ = 3972166560. Its totient is φ = 1321345888.

The previous prime is 2645401361. The next prime is 2645401471. The reversal of 2645401406 is 6041045462.

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

It is a Curzon number.

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, 674966 + ... + 678873.

It is an arithmetic number, because the mean of its divisors is an integer number (496520820).

Almost surely, 2^2645401406 is an apocalyptic number.

2645401406 is a deficient number, since it is larger than the sum of its proper divisors (1326765154).

2645401406 is a wasteful number, since it uses less digits than its factorization.

2645401406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1354818.

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 2645401406 is about 51433.4658175006. The cubic root of 2645401406 is about 1383.0265796947.

Adding to 2645401406 its reverse (6041045462), we get a palindrome (8686446868).

The spelling of 2645401406 in words is "two billion, six hundred forty-five million, four hundred one thousand, four hundred six".