63512740 has 24 divisors (see below), whose sum is σ = 134278200. Its totient is φ = 25233408.

The previous prime is 63512737. The next prime is 63512747. The reversal of 63512740 is 4721536.

It can be written as a sum of positive squares in 4 ways, for example, as 23716 + 63489024 = 154^2 + 7968^2 .

It is a junction number, because it is equal to n+sod(n) for n = 63512699 and 63512708.

It is not an unprimeable number, because it can be changed into a prime (63512747) 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, 7677 + ... + 13636.

It is an arithmetic number, because the mean of its divisors is an integer number (5594925).

Almost surely, 2^63512740 is an apocalyptic number.

It is an amenable number.

63512740 is an abundant number, since it is smaller than the sum of its proper divisors (70765460).

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

63512740 is a wasteful number, since it uses less digits than its factorization.

63512740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21471 (or 21469 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 63512740 is about 7969.4880638596. The cubic root of 63512740 is about 398.9822878510.

The spelling of 63512740 in words is "sixty-three million, five hundred twelve thousand, seven hundred forty".