61240563 has 16 divisors (see below), whose sum is σ = 91878400. Its totient is φ = 40308840.

The previous prime is 61240561. The next prime is 61240583. The reversal of 61240563 is 36504216.

61240563 is a `hidden beast` number, since 61 + 2 + 40 + 563 = 666.

It is not a de Polignac number, because 61240563 - 2¹ = 61240561 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61240561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12223 + ... + 16488.

It is an arithmetic number, because the mean of its divisors is an integer number (5742400).

Almost surely, 2^61240563 is an apocalyptic number.

61240563 is a deficient number, since it is larger than the sum of its proper divisors (30637837).

61240563 is a wasteful number, since it uses less digits than its factorization.

61240563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28799 (or 28793 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 61240563 is about 7825.6349902101. The cubic root of 61240563 is about 394.1665125417.

Adding to 61240563 its reverse (36504216), we get a palindrome (97744779).

The spelling of 61240563 in words is "sixty-one million, two hundred forty thousand, five hundred sixty-three".