2645690540 has 24 divisors (see below), whose sum is σ = 5618380320. Its totient is φ = 1046384768.

The previous prime is 2645690527. The next prime is 2645690563. The reversal of 2645690540 is 450965462.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 741392 + ... + 744951.

It is an arithmetic number, because the mean of its divisors is an integer number (234099180).

Almost surely, 2^2645690540 is an apocalyptic number.

2645690540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2645690540 is an abundant number, since it is smaller than the sum of its proper divisors (2972689780).

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

2645690540 is a wasteful number, since it uses less digits than its factorization.

2645690540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1486441 (or 1486439 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 41.

The square root of 2645690540 is about 51436.2764982070. The cubic root of 2645690540 is about 1383.0769646682.

The spelling of 2645690540 in words is "two billion, six hundred forty-five million, six hundred ninety thousand, five hundred forty".