63013640 has 16 divisors (see below), whose sum is σ = 141780780. Its totient is φ = 25205440.

The previous prime is 63013637. The next prime is 63013651. The reversal of 63013640 is 4631036.

It can be written as a sum of positive squares in 2 ways, for example, as 57547396 + 5466244 = 7586^2 + 2338^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 787631 + ... + 787710.

Almost surely, 2^63013640 is an apocalyptic number.

It is an amenable number.

63013640 is an abundant number, since it is smaller than the sum of its proper divisors (78767140).

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

63013640 is a wasteful number, since it uses less digits than its factorization.

63013640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1575352 (or 1575348 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 63013640 is about 7938.1131259261. The cubic root of 63013640 is about 397.9344352996.

Adding to 63013640 its reverse (4631036), we get a palindrome (67644676).

The spelling of 63013640 in words is "sixty-three million, thirteen thousand, six hundred forty".