61613405 has 16 divisors (see below), whose sum is σ = 85933440. Its totient is φ = 41531712.

The previous prime is 61613369. The next prime is 61613407. The reversal of 61613405 is 50431616.

It is a cyclic number.

It is not a de Polignac number, because 61613405 - 2⁶ = 61613341 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 (61613407) 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, 12854 + ... + 16983.

It is an arithmetic number, because the mean of its divisors is an integer number (5370840).

Almost surely, 2^61613405 is an apocalyptic number.

It is an amenable number.

61613405 is a deficient number, since it is larger than the sum of its proper divisors (24320035).

61613405 is a wasteful number, since it uses less digits than its factorization.

61613405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29908.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 61613405 is about 7849.4206792603. The cubic root of 61613405 is about 394.9648101963.

The spelling of 61613405 in words is "sixty-one million, six hundred thirteen thousand, four hundred five".