61565149 has 8 divisors (see below), whose sum is σ = 66386880. Its totient is φ = 56901600.

The previous prime is 61565117. The next prime is 61565201. The reversal of 61565149 is 94156516.

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

It is a cyclic number.

It is not a de Polignac number, because 61565149 - 2⁵ = 61565117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61568149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38737 + ... + 40294.

It is an arithmetic number, because the mean of its divisors is an integer number (8298360).

Almost surely, 2^61565149 is an apocalyptic number.

It is an amenable number.

61565149 is a deficient number, since it is larger than the sum of its proper divisors (4821731).

61565149 is a wasteful number, since it uses less digits than its factorization.

61565149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79091.

The product of its digits is 32400, while the sum is 37.

The square root of 61565149 is about 7846.3462197382. The cubic root of 61565149 is about 394.8616703040.

The spelling of 61565149 in words is "sixty-one million, five hundred sixty-five thousand, one hundred forty-nine".