2635633540 has 72 divisors (see below), whose sum is σ = 5684861952. Its totient is φ = 1026305280.

The previous prime is 2635633531. The next prime is 2635633589. The reversal of 2635633540 is 453365362.

It is a self number, because there is not a number n which added to its sum of digits gives 2635633540.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20119275 + ... + 20119405.

It is an arithmetic number, because the mean of its divisors is an integer number (78956416).

Almost surely, 2^2635633540 is an apocalyptic number.

2635633540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2635633540 is an abundant number, since it is smaller than the sum of its proper divisors (3049228412).

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

2635633540 is a wasteful number, since it uses less digits than its factorization.

2635633540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445 (or 354 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 37.

The square root of 2635633540 is about 51338.4216742198. The cubic root of 2635633540 is about 1381.3222536407.

The spelling of 2635633540 in words is "two billion, six hundred thirty-five million, six hundred thirty-three thousand, five hundred forty".