63115560 has 96 divisors (see below), whose sum is σ = 217212840. Its totient is φ = 15839232.

The previous prime is 63115553. The next prime is 63115567. The reversal of 63115560 is 6551136.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (63115553) and next prime (63115567).

It can be written as a sum of positive squares in 4 ways, for example, as 55264356 + 7851204 = 7434^2 + 2802^2 .

It is a super-2 number, since 2×63115560² = 7967147828227200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (63115567) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 964 + ... + 11276.

Almost surely, 2^63115560 is an apocalyptic number.

63115560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63115560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108606420).

63115560 is an abundant number, since it is smaller than the sum of its proper divisors (154097280).

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

63115560 is a wasteful number, since it uses less digits than its factorization.

63115560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10347 (or 10340 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 63115560 is about 7944.5301937874. The cubic root of 63115560 is about 398.1488631124.

Adding to 63115560 its reverse (6551136), we get a palindrome (69666696).

The spelling of 63115560 in words is "sixty-three million, one hundred fifteen thousand, five hundred sixty".