61232123565505 has 4 divisors (see below), whose sum is σ = 73478548278612. Its totient is φ = 48985698852400.

The previous prime is 61232123565497. The next prime is 61232123565523. The reversal of 61232123565505 is 50556532123216.

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 32851284412816 + 28380839152689 = 5731604^2 + 5327367^2 .

It is not a de Polignac number, because 61232123565505 - 2³ = 61232123565497 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, 6123212356546 + ... + 6123212356555.

It is an arithmetic number, because the mean of its divisors is an integer number (18369637069653).

Almost surely, 2^{61232123565505} is an apocalyptic number.

It is an amenable number.

61232123565505 is a deficient number, since it is larger than the sum of its proper divisors (12246424713107).

61232123565505 is a wasteful number, since it uses less digits than its factorization.

61232123565505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12246424713106.

The product of its (nonzero) digits is 1620000, while the sum is 46.

The spelling of 61232123565505 in words is "sixty-one trillion, two hundred thirty-two billion, one hundred twenty-three million, five hundred sixty-five thousand, five hundred five".