61697360 has 20 divisors (see below), whose sum is σ = 143446548. Its totient is φ = 24678912.

The previous prime is 61697359. The next prime is 61697371. The reversal of 61697360 is 6379616.

It can be written as a sum of positive squares in 2 ways, for example, as 30382144 + 31315216 = 5512^2 + 5596^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 385529 + ... + 385688.

Almost surely, 2^61697360 is an apocalyptic number.

It is an amenable number.

61697360 is an abundant number, since it is smaller than the sum of its proper divisors (81749188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61697360 is a wasteful number, since it uses less digits than its factorization.

61697360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771230 (or 771224 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 61697360 is about 7854.7667056380. The cubic root of 61697360 is about 395.1441230206.

The spelling of 61697360 in words is "sixty-one million, six hundred ninety-seven thousand, three hundred sixty".