61133664211 has 4 divisors (see below), whose sum is σ = 61143045624. Its totient is φ = 61124282800.

The previous prime is 61133664209. The next prime is 61133664287. The reversal of 61133664211 is 11246633116.

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 61133664211 - 2¹ = 61133664209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61133664611) 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, 4680925 + ... + 4693966.

It is an arithmetic number, because the mean of its divisors is an integer number (15285761406).

Almost surely, 2^61133664211 is an apocalyptic number.

61133664211 is a deficient number, since it is larger than the sum of its proper divisors (9381413).

61133664211 is an equidigital number, since it uses as much as digits as its factorization.

61133664211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9381412.

The product of its digits is 15552, while the sum is 34.

The spelling of 61133664211 in words is "sixty-one billion, one hundred thirty-three million, six hundred sixty-four thousand, two hundred eleven".