2645401854 has 8 divisors (see below), whose sum is σ = 5290803720. Its totient is φ = 881800616.

The previous prime is 2645401849. The next prime is 2645401861. The reversal of 2645401854 is 4581045462.

It is a happy number.

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

2645401854 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 220450149 + ... + 220450160.

It is an arithmetic number, because the mean of its divisors is an integer number (661350465).

Almost surely, 2^2645401854 is an apocalyptic number.

2645401854 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2645401854 is a wasteful number, since it uses less digits than its factorization.

2645401854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440900314.

The product of its (nonzero) digits is 153600, while the sum is 39.

The square root of 2645401854 is about 51433.4701726415. The cubic root of 2645401854 is about 1383.0266577667.

The spelling of 2645401854 in words is "two billion, six hundred forty-five million, four hundred one thousand, eight hundred fifty-four".