61611649 has 8 divisors (see below), whose sum is σ = 67665600. Its totient is φ = 55633200.

The previous prime is 61611629. The next prime is 61611653. The reversal of 61611649 is 94611616.

It is a happy number.

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 61611649 - 2⁷ = 61611521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61611629) 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, 17157 + ... + 20434.

It is an arithmetic number, because the mean of its divisors is an integer number (8458200).

Almost surely, 2^61611649 is an apocalyptic number.

It is an amenable number.

61611649 is a deficient number, since it is larger than the sum of its proper divisors (6053951).

61611649 is a wasteful number, since it uses less digits than its factorization.

61611649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37751.

The product of its digits is 7776, while the sum is 34.

The square root of 61611649 is about 7849.3088230748. The cubic root of 61611649 is about 394.9610579566.

The spelling of 61611649 in words is "sixty-one million, six hundred eleven thousand, six hundred forty-nine".