61336917973 has 4 divisors (see below), whose sum is σ = 63451984140. Its totient is φ = 59221851808.

The previous prime is 61336917841. The next prime is 61336917989. The reversal of 61336917973 is 37971963316.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15781138129 + 45555779844 = 125623^2 + 213438^2 .

It is a cyclic number.

It is not a de Polignac number, because 61336917973 - 2⁹ = 61336917461 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 (61336917673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1057533040 + ... + 1057533097.

It is an arithmetic number, because the mean of its divisors is an integer number (15862996035).

Almost surely, 2^61336917973 is an apocalyptic number.

It is an amenable number.

61336917973 is a deficient number, since it is larger than the sum of its proper divisors (2115066167).

61336917973 is a wasteful number, since it uses less digits than its factorization.

61336917973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2115066166.

The product of its digits is 3857868, while the sum is 55.

The spelling of 61336917973 in words is "sixty-one billion, three hundred thirty-six million, nine hundred seventeen thousand, nine hundred seventy-three".