61356012665 has 8 divisors (see below), whose sum is σ = 76002286848. Its totient is φ = 47501429040.

The previous prime is 61356012631. The next prime is 61356012719. The reversal of 61356012665 is 56621065316.

61356012665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 61356012665 - 2¹⁴ = 61355996281 is a prime.

It is a Duffinian 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, 197922467 + ... + 197922776.

It is an arithmetic number, because the mean of its divisors is an integer number (9500285856).

Almost surely, 2^61356012665 is an apocalyptic number.

It is an amenable number.

61356012665 is a deficient number, since it is larger than the sum of its proper divisors (14646274183).

61356012665 is a wasteful number, since it uses less digits than its factorization.

61356012665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395845279.

The product of its (nonzero) digits is 194400, while the sum is 41.

The spelling of 61356012665 in words is "sixty-one billion, three hundred fifty-six million, twelve thousand, six hundred sixty-five".