61611264605 has 32 divisors (see below), whose sum is σ = 84857234688. Its totient is φ = 42859903680.

The previous prime is 61611264541. The next prime is 61611264647. The reversal of 61611264605 is 50646211616.

It is a happy number.

It is not a de Polignac number, because 61611264605 - 2⁶ = 61611264541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48194 + ... + 354323.

It is an arithmetic number, because the mean of its divisors is an integer number (2651788584).

Almost surely, 2^61611264605 is an apocalyptic number.

It is an amenable number.

61611264605 is a deficient number, since it is larger than the sum of its proper divisors (23245970083).

61611264605 is a wasteful number, since it uses less digits than its factorization.

61611264605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402578 (or 402556 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 61611264605 in words is "sixty-one billion, six hundred eleven million, two hundred sixty-four thousand, six hundred five".