61405230563 has 4 divisors (see below), whose sum is σ = 61441416840. Its totient is φ = 61369044288.

The previous prime is 61405230539. The next prime is 61405230581. The reversal of 61405230563 is 36503250416.

61405230563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 61405230563 - 2⁶ = 61405230499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61405230463) 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, 18090593 + ... + 18093986.

It is an arithmetic number, because the mean of its divisors is an integer number (15360354210).

Almost surely, 2^61405230563 is an apocalyptic number.

61405230563 is a deficient number, since it is larger than the sum of its proper divisors (36186277).

61405230563 is a wasteful number, since it uses less digits than its factorization.

61405230563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36186276.

The product of its (nonzero) digits is 64800, while the sum is 35.

Adding to 61405230563 its reverse (36503250416), we get a palindrome (97908480979).

The spelling of 61405230563 in words is "sixty-one billion, four hundred five million, two hundred thirty thousand, five hundred sixty-three".