2640554420 has 48 divisors (see below), whose sum is σ = 6431940480. Its totient is φ = 891817344.

The previous prime is 2640554419. The next prime is 2640554443. The reversal of 2640554420 is 244550462.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131375 + ... + 150134.

It is an arithmetic number, because the mean of its divisors is an integer number (133998760).

Almost surely, 2^2640554420 is an apocalyptic number.

2640554420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2640554420 is an abundant number, since it is smaller than the sum of its proper divisors (3791386060).

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

2640554420 is a wasteful number, since it uses less digits than its factorization.

2640554420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281592 (or 281590 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 32.

The square root of 2640554420 is about 51386.3252237402. The cubic root of 2640554420 is about 1382.1813886457.

The spelling of 2640554420 in words is "two billion, six hundred forty million, five hundred fifty-four thousand, four hundred twenty".