5451777021 has 8 divisors (see below), whose sum is σ = 7368612160. Its totient is φ = 3584729952.

The previous prime is 5451777017. The next prime is 5451777043. The reversal of 5451777021 is 1207771545.

It is a happy number.

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

It is not a de Polignac number, because 5451777021 - 2² = 5451777017 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 (5451776021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12446761 + ... + 12447198.

It is an arithmetic number, because the mean of its divisors is an integer number (921076520).

Almost surely, 2^5451777021 is an apocalyptic number.

It is an amenable number.

5451777021 is a deficient number, since it is larger than the sum of its proper divisors (1916835139).

5451777021 is a wasteful number, since it uses less digits than its factorization.

5451777021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24894035.

The product of its (nonzero) digits is 68600, while the sum is 39.

The square root of 5451777021 is about 73836.1498251365. The cubic root of 5451777021 is about 1760.0001098700. Note that the first 3 decimals are identical.

The spelling of 5451777021 in words is "five billion, four hundred fifty-one million, seven hundred seventy-seven thousand, twenty-one".