61411635464561 has 4 divisors (see below), whose sum is σ = 61720236648000. Its totient is φ = 61103034281124.

The previous prime is 61411635464489. The next prime is 61411635464587. The reversal of 61411635464561 is 16546453611416.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61411635464561 - 2¹⁰ = 61411635463537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61411635764561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154300591421 + ... + 154300591818.

It is an arithmetic number, because the mean of its divisors is an integer number (15430059162000).

Almost surely, 2^{61411635464561} is an apocalyptic number.

It is an amenable number.

61411635464561 is a deficient number, since it is larger than the sum of its proper divisors (308601183439).

61411635464561 is a wasteful number, since it uses less digits than its factorization.

61411635464561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308601183438.

The product of its digits is 6220800, while the sum is 53.

The spelling of 61411635464561 in words is "sixty-one trillion, four hundred eleven billion, six hundred thirty-five million, four hundred sixty-four thousand, five hundred sixty-one".