61522055625665 has 8 divisors (see below), whose sum is σ = 73863885144168. Its totient is φ = 49192698904960.

The previous prime is 61522055625643. The next prime is 61522055625683. The reversal of 61522055625665 is 56652655022516.

It can be written as a sum of positive squares in 4 ways, for example, as 12852024240784 + 48670031384881 = 3584972^2 + 6976391^2 .

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

It is not a de Polignac number, because 61522055625665 - 2¹⁴ = 61522055609281 is a prime.

It is a super-6 number, since 6×61522055625665⁶ (a number of 84 digits) contains 666666 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 61522055625665.

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, 3118188596 + ... + 3118208325.

It is an arithmetic number, because the mean of its divisors is an integer number (9232985643021).

Almost surely, 2^{61522055625665} is an apocalyptic number.

It is an amenable number.

61522055625665 is a deficient number, since it is larger than the sum of its proper divisors (12341829518503).

61522055625665 is a wasteful number, since it uses less digits than its factorization.

61522055625665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6236398899.

The product of its (nonzero) digits is 32400000, while the sum is 56.

The spelling of 61522055625665 in words is "sixty-one trillion, five hundred twenty-two billion, fifty-five million, six hundred twenty-five thousand, six hundred sixty-five".