61005964737 has 16 divisors (see below), whose sum is σ = 86446258560. Its totient is φ = 38135945472.

The previous prime is 61005964717. The next prime is 61005964739. The reversal of 61005964737 is 73746950016.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-61005964737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61005964739) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2209693 + ... + 2237130.

It is an arithmetic number, because the mean of its divisors is an integer number (5402891160).

Almost surely, 2^61005964737 is an apocalyptic number.

It is an amenable number.

61005964737 is a deficient number, since it is larger than the sum of its proper divisors (25440293823).

61005964737 is a wasteful number, since it uses less digits than its factorization.

61005964737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4447112.

The product of its (nonzero) digits is 952560, while the sum is 48.

The spelling of 61005964737 in words is "sixty-one billion, five million, nine hundred sixty-four thousand, seven hundred thirty-seven".