61604263965 has 16 divisors (see below), whose sum is σ = 98571227328. Its totient is φ = 32854139136.

The previous prime is 61604263891. The next prime is 61604263993. The reversal of 61604263965 is 56936240616.

It is a happy number.

It is not a de Polignac number, because 61604263965 - 2⁹ = 61604263453 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 312517 + ... + 469973.

It is an arithmetic number, because the mean of its divisors is an integer number (6160701708).

Almost surely, 2^61604263965 is an apocalyptic number.

It is an amenable number.

61604263965 is a deficient number, since it is larger than the sum of its proper divisors (36966963363).

61604263965 is a wasteful number, since it uses less digits than its factorization.

61604263965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183548.

The product of its (nonzero) digits is 1399680, while the sum is 48.

The spelling of 61604263965 in words is "sixty-one billion, six hundred four million, two hundred sixty-three thousand, nine hundred sixty-five".