61827995191 has 4 divisors (see below), whose sum is σ = 62994561192. Its totient is φ = 60661429192.

The previous prime is 61827995149. The next prime is 61827995197. The reversal of 61827995191 is 19159972816.

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 61827995191 - 2²⁷ = 61693777463 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61827995197) 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, 583282921 + ... + 583283026.

It is an arithmetic number, because the mean of its divisors is an integer number (15748640298).

Almost surely, 2^61827995191 is an apocalyptic number.

61827995191 is a deficient number, since it is larger than the sum of its proper divisors (1166566001).

61827995191 is a wasteful number, since it uses less digits than its factorization.

61827995191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1166566000.

The product of its digits is 2449440, while the sum is 58.

The spelling of 61827995191 in words is "sixty-one billion, eight hundred twenty-seven million, nine hundred ninety-five thousand, one hundred ninety-one".