61245563 has 4 divisors (see below), whose sum is σ = 61325568. Its totient is φ = 61165560.

The previous prime is 61245557. The next prime is 61245601. The reversal of 61245563 is 36554216.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61245563 - 2⁸ = 61245307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61245463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38843 + ... + 40388.

It is an arithmetic number, because the mean of its divisors is an integer number (15331392).

Almost surely, 2^61245563 is an apocalyptic number.

61245563 is a deficient number, since it is larger than the sum of its proper divisors (80005).

61245563 is an equidigital number, since it uses as much as digits as its factorization.

61245563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80004.

The product of its digits is 21600, while the sum is 32.

The square root of 61245563 is about 7825.9544465835. The cubic root of 61245563 is about 394.1772395219.

Adding to 61245563 its reverse (36554216), we get a palindrome (97799779).

The spelling of 61245563 in words is "sixty-one million, two hundred forty-five thousand, five hundred sixty-three".