5451681399 has 8 divisors (see below), whose sum is σ = 7446199152. Its totient is φ = 3545808960.

The previous prime is 5451681379. The next prime is 5451681407. The reversal of 5451681399 is 9931861545.

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

It is not a de Polignac number, because 5451681399 - 2¹⁹ = 5451157111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5451681349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22161184 + ... + 22161429.

It is an arithmetic number, because the mean of its divisors is an integer number (930774894).

Almost surely, 2^5451681399 is an apocalyptic number.

5451681399 is a deficient number, since it is larger than the sum of its proper divisors (1994517753).

5451681399 is a wasteful number, since it uses less digits than its factorization.

5451681399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44322657.

The product of its digits is 1166400, while the sum is 51.

The square root of 5451681399 is about 73835.5022939507. The cubic root of 5451681399 is about 1759.9898199093.

The spelling of 5451681399 in words is "five billion, four hundred fifty-one million, six hundred eighty-one thousand, three hundred ninety-nine".