61551852996965 has 8 divisors (see below), whose sum is σ = 73862404486008. Its totient is φ = 49241361804480.

The previous prime is 61551852996947. The next prime is 61551852997003. The reversal of 61551852996965 is 56969925815516.

61551852996965 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 14478435942916 + 47073417054049 = 3805054^2 + 6861007^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61551852996965 - 2³⁸ = 61276975090021 is a prime.

It is a super-2 number, since 2×61551852996965² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12797066 + ... + 16937195.

It is an arithmetic number, because the mean of its divisors is an integer number (9232800560751).

Almost surely, 2^{61551852996965} is an apocalyptic number.

It is an amenable number.

61551852996965 is a deficient number, since it is larger than the sum of its proper divisors (12310551489043).

61551852996965 is a wasteful number, since it uses less digits than its factorization.

61551852996965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30148279.

The product of its digits is 1574640000, while the sum is 77.

The spelling of 61551852996965 in words is "sixty-one trillion, five hundred fifty-one billion, eight hundred fifty-two million, nine hundred ninety-six thousand, nine hundred sixty-five".