61716205 has 16 divisors (see below), whose sum is σ = 81123120. Its totient is φ = 44864512.

The previous prime is 61716203. The next prime is 61716211. The reversal of 61716205 is 50261716.

It can be written as a sum of positive squares in 8 ways, for example, as 454276 + 61261929 = 674^2 + 7827^2 .

It is a cyclic number.

It is not a de Polignac number, because 61716205 - 2¹ = 61716203 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61716203) 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, 10054 + ... + 14983.

It is an arithmetic number, because the mean of its divisors is an integer number (5070195).

Almost surely, 2^61716205 is an apocalyptic number.

It is an amenable number.

61716205 is a deficient number, since it is larger than the sum of its proper divisors (19406915).

61716205 is a wasteful number, since it uses less digits than its factorization.

61716205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25088.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 61716205 is about 7855.9662041025. The cubic root of 61716205 is about 395.1843502035.

The spelling of 61716205 in words is "sixty-one million, seven hundred sixteen thousand, two hundred five".