61964787713 has 4 divisors (see below), whose sum is σ = 61970504880. Its totient is φ = 61959070548.

The previous prime is 61964787673. The next prime is 61964787763. The reversal of 61964787713 is 31778746916.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61964787713 - 2²⁰ = 61963739137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61964787763) 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, 2842295 + ... + 2864012.

It is an arithmetic number, because the mean of its divisors is an integer number (15492626220).

Almost surely, 2^61964787713 is an apocalyptic number.

It is an amenable number.

61964787713 is a deficient number, since it is larger than the sum of its proper divisors (5717167).

61964787713 is a wasteful number, since it uses less digits than its factorization.

61964787713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5717166.

The product of its digits is 10668672, while the sum is 59.

The spelling of 61964787713 in words is "sixty-one billion, nine hundred sixty-four million, seven hundred eighty-seven thousand, seven hundred thirteen".