61617049 has 8 divisors (see below), whose sum is σ = 66577280. Its totient is φ = 56688336.

The previous prime is 61617043. The next prime is 61617079. The reversal of 61617049 is 94071616.

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 61617049 - 2³ = 61617041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61617041) 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, 3729 + ... + 11710.

It is an arithmetic number, because the mean of its divisors is an integer number (8322160).

Almost surely, 2^61617049 is an apocalyptic number.

It is an amenable number.

61617049 is a deficient number, since it is larger than the sum of its proper divisors (4960231).

61617049 is a wasteful number, since it uses less digits than its factorization.

61617049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15759.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 61617049 is about 7849.6527948693. The cubic root of 61617049 is about 394.9725965073.

The spelling of 61617049 in words is "sixty-one million, six hundred seventeen thousand, forty-nine".