2645840887 has 8 divisors (see below), whose sum is σ = 2655734400. Its totient is φ = 2635959480.

The previous prime is 2645840867. The next prime is 2645840891. The reversal of 2645840887 is 7880485462.

It is a happy number.

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 2645840887 - 2³¹ = 498357239 is a prime.

It is a super-4 number, since 4×2645840887⁴ (a number of 39 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2645840837) 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, 800364 + ... + 803662.

It is an arithmetic number, because the mean of its divisors is an integer number (331966800).

Almost surely, 2^2645840887 is an apocalyptic number.

2645840887 is a deficient number, since it is larger than the sum of its proper divisors (9893513).

2645840887 is a wasteful number, since it uses less digits than its factorization.

2645840887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6053.

The product of its (nonzero) digits is 3440640, while the sum is 52.

The square root of 2645840887 is about 51437.7379654277. The cubic root of 2645840887 is about 1383.1031629367.

The spelling of 2645840887 in words is "two billion, six hundred forty-five million, eight hundred forty thousand, eight hundred eighty-seven".