61339955993317 has 4 divisors (see below), whose sum is σ = 61340331171136. Its totient is φ = 61339580815500.

The previous prime is 61339955993249. The next prime is 61339955993333. The reversal of 61339955993317 is 71339955993316.

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 61339955993317 - 2⁴³ = 52543862971109 is a prime.

It is a super-2 number, since 2×61339955993317² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61339955993317.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61339955993387) 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, 187343559 + ... + 187670692.

It is an arithmetic number, because the mean of its divisors is an integer number (15335082792784).

Almost surely, 2^{61339955993317} is an apocalyptic number.

It is an amenable number.

61339955993317 is a deficient number, since it is larger than the sum of its proper divisors (375177819).

61339955993317 is a wasteful number, since it uses less digits than its factorization.

61339955993317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375177818.

The product of its digits is 558013050, while the sum is 73.

Subtracting 61339955993317 from its reverse (71339955993316), we obtain a palindrome (9999999999999).

The spelling of 61339955993317 in words is "sixty-one trillion, three hundred thirty-nine billion, nine hundred fifty-five million, nine hundred ninety-three thousand, three hundred seventeen".