5420681891 has 8 divisors (see below), whose sum is σ = 5458459104. Its totient is φ = 5382968320.

The previous prime is 5420681887. The next prime is 5420681911. The reversal of 5420681891 is 1981860245.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5420681891 - 2² = 5420681887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5420681821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161891 + ... + 192483.

It is an arithmetic number, because the mean of its divisors is an integer number (682307388).

Almost surely, 2^5420681891 is an apocalyptic number.

5420681891 is a deficient number, since it is larger than the sum of its proper divisors (37777213).

5420681891 is a wasteful number, since it uses less digits than its factorization.

5420681891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31821.

The product of its (nonzero) digits is 138240, while the sum is 44.

The square root of 5420681891 is about 73625.2802439488. The cubic root of 5420681891 is about 1756.6475753348.

The spelling of 5420681891 in words is "five billion, four hundred twenty million, six hundred eighty-one thousand, eight hundred ninety-one".