61318304405 has 32 divisors (see below), whose sum is σ = 79363134720. Its totient is φ = 45370068480.

The previous prime is 61318304387. The next prime is 61318304407. The reversal of 61318304405 is 50440381316.

61318304405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61318304405 - 2¹⁰ = 61318303381 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61318304407) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 339809 + ... + 487961.

It is an arithmetic number, because the mean of its divisors is an integer number (2480097960).

Almost surely, 2^61318304405 is an apocalyptic number.

It is an amenable number.

61318304405 is a deficient number, since it is larger than the sum of its proper divisors (18044830315).

61318304405 is a wasteful number, since it uses less digits than its factorization.

61318304405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148301.

The product of its (nonzero) digits is 34560, while the sum is 35.

The spelling of 61318304405 in words is "sixty-one billion, three hundred eighteen million, three hundred four thousand, four hundred five".