61526112665 has 4 divisors (see below), whose sum is σ = 73831335204. Its totient is φ = 49220890128.

The previous prime is 61526112643. The next prime is 61526112691. The reversal of 61526112665 is 56621162516.

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 34344984976 + 27181127689 = 185324^2 + 164867^2 .

It is a cyclic number.

It is not a de Polignac number, because 61526112665 - 2¹⁶ = 61526047129 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6152611262 + ... + 6152611271.

It is an arithmetic number, because the mean of its divisors is an integer number (18457833801).

Almost surely, 2^61526112665 is an apocalyptic number.

It is an amenable number.

61526112665 is a deficient number, since it is larger than the sum of its proper divisors (12305222539).

61526112665 is a wasteful number, since it uses less digits than its factorization.

61526112665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12305222538.

The product of its digits is 129600, while the sum is 41.

The spelling of 61526112665 in words is "sixty-one billion, five hundred twenty-six million, one hundred twelve thousand, six hundred sixty-five".