61824188421 has 6 divisors (see below), whose sum is σ = 89301605510. Its totient is φ = 41216125608.

The previous prime is 61824188383. The next prime is 61824188453. The reversal of 61824188421 is 12488142816.

61824188421 is a `hidden beast` number, since 6 + 182 + 41 + 8 + 8 + 421 = 666.

It can be written as a sum of positive squares in only one way, i.e., 45920204100 + 15903984321 = 214290^2 + 126111^2 .

It is not a de Polignac number, because 61824188421 - 2⁶ = 61824188357 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 (61824184421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3434677126 + ... + 3434677143.

Almost surely, 2^61824188421 is an apocalyptic number.

It is an amenable number.

61824188421 is a deficient number, since it is larger than the sum of its proper divisors (27477417089).

61824188421 is a wasteful number, since it uses less digits than its factorization.

61824188421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6869354275 (or 6869354272 counting only the distinct ones).

The product of its digits is 196608, while the sum is 45.

The spelling of 61824188421 in words is "sixty-one billion, eight hundred twenty-four million, one hundred eighty-eight thousand, four hundred twenty-one".