61685654 has 8 divisors (see below), whose sum is σ = 92889288. Its totient is φ = 30722560.

The previous prime is 61685653. The next prime is 61685671. The reversal of 61685654 is 45658616.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61685651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59492 + ... + 60519.

It is an arithmetic number, because the mean of its divisors is an integer number (11611161).

Almost surely, 2^61685654 is an apocalyptic number.

61685654 is a deficient number, since it is larger than the sum of its proper divisors (31203634).

61685654 is a wasteful number, since it uses less digits than its factorization.

61685654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120270.

The product of its digits is 172800, while the sum is 41.

The square root of 61685654 is about 7854.0215176685. The cubic root of 61685654 is about 395.1191308671.

The spelling of 61685654 in words is "sixty-one million, six hundred eighty-five thousand, six hundred fifty-four".