63530640 has 60 divisors (see below), whose sum is σ = 213359484. Its totient is φ = 16941312.

The previous prime is 63530629. The next prime is 63530653. The reversal of 63530640 is 4603536.

It can be written as a sum of positive squares in 2 ways, for example, as 24443136 + 39087504 = 4944^2 + 6252^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-2 number, since 2×63530640² = 8072284437619200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43399 + ... + 44838.

Almost surely, 2^63530640 is an apocalyptic number.

63530640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

63530640 is an abundant number, since it is smaller than the sum of its proper divisors (149828844).

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

63530640 is a wasteful number, since it uses less digits than its factorization.

63530640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88256 (or 88247 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 63530640 is about 7970.6110179835. The cubic root of 63530640 is about 399.0197664845.

The spelling of 63530640 in words is "sixty-three million, five hundred thirty thousand, six hundred forty".