61605959 has 8 divisors (see below), whose sum is σ = 63792768. Its totient is φ = 59431680.

The previous prime is 61605953. The next prime is 61605967. The reversal of 61605959 is 95950616.

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 61605959 - 2²⁴ = 44828743 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 (61605953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7499 + ... + 13395.

It is an arithmetic number, because the mean of its divisors is an integer number (7974096).

Almost surely, 2^61605959 is an apocalyptic number.

61605959 is a deficient number, since it is larger than the sum of its proper divisors (2186809).

61605959 is a wasteful number, since it uses less digits than its factorization.

61605959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6265.

The product of its (nonzero) digits is 72900, while the sum is 41.

The square root of 61605959 is about 7848.9463624107. The cubic root of 61605959 is about 394.9488990135.

The spelling of 61605959 in words is "sixty-one million, six hundred five thousand, nine hundred fifty-nine".