61611799 has 4 divisors (see below), whose sum is σ = 61636680. Its totient is φ = 61586920.

The previous prime is 61611773. The next prime is 61611817. The reversal of 61611799 is 99711616.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61611799 - 2⁹ = 61611287 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61611709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8257 + ... + 13834.

It is an arithmetic number, because the mean of its divisors is an integer number (15409170).

Almost surely, 2^61611799 is an apocalyptic number.

61611799 is a deficient number, since it is larger than the sum of its proper divisors (24881).

61611799 is a wasteful number, since it uses less digits than its factorization.

61611799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24880.

The product of its digits is 20412, while the sum is 40.

The square root of 61611799 is about 7849.3183780504. The cubic root of 61611799 is about 394.9613784810.

The spelling of 61611799 in words is "sixty-one million, six hundred eleven thousand, seven hundred ninety-nine".