61604611 has 4 divisors (see below), whose sum is σ = 61787752. Its totient is φ = 61421472.

The previous prime is 61604579. The next prime is 61604633. The reversal of 61604611 is 11640616.

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 61604611 - 2⁵ = 61604579 is a prime.

It is a super-2 number, since 2×61604611² = 7590256192922642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61604111) 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, 91065 + ... + 91738.

It is an arithmetic number, because the mean of its divisors is an integer number (15446938).

Almost surely, 2^61604611 is an apocalyptic number.

61604611 is a deficient number, since it is larger than the sum of its proper divisors (183141).

61604611 is a wasteful number, since it uses less digits than its factorization.

61604611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183140.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 61604611 is about 7848.8604905426. The cubic root of 61604611 is about 394.9460183668.

The spelling of 61604611 in words is "sixty-one million, six hundred four thousand, six hundred eleven".