61105965096511 has 4 divisors (see below), whose sum is σ = 61710974652024. Its totient is φ = 60500955541000.

The previous prime is 61105965096437. The next prime is 61105965096523. The reversal of 61105965096511 is 11569056950116.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61105965096511 - 2³⁹ = 60556209282623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61105965096541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 302504777605 + ... + 302504777806.

It is an arithmetic number, because the mean of its divisors is an integer number (15427743663006).

Almost surely, 2^{61105965096511} is an apocalyptic number.

61105965096511 is a deficient number, since it is larger than the sum of its proper divisors (605009555513).

61105965096511 is a wasteful number, since it uses less digits than its factorization.

61105965096511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605009555512.

The product of its (nonzero) digits is 2187000, while the sum is 55.

The spelling of 61105965096511 in words is "sixty-one trillion, one hundred five billion, nine hundred sixty-five million, ninety-six thousand, five hundred eleven".