5451677721 has 36 divisors (see below), whose sum is σ = 9355237632. Its totient is φ = 3048951024.

The previous prime is 5451677689. The next prime is 5451677731. The reversal of 5451677721 is 1277761545.

5451677721 is a `hidden beast` number, since 545 + 16 + 7 + 77 + 21 = 666.

It is not a de Polignac number, because 5451677721 - 2⁵ = 5451677689 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5451677731) 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 35 ways as a sum of consecutive naturals, for example, 110785 + ... + 152238.

It is an arithmetic number, because the mean of its divisors is an integer number (259867712).

Almost surely, 2^5451677721 is an apocalyptic number.

It is an amenable number.

5451677721 is a deficient number, since it is larger than the sum of its proper divisors (3903559911).

5451677721 is a wasteful number, since it uses less digits than its factorization.

5451677721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263090 (or 263080 counting only the distinct ones).

The product of its digits is 411600, while the sum is 45.

The square root of 5451677721 is about 73835.4773872290. The cubic root of 5451677721 is about 1759.9894241143.

The spelling of 5451677721 in words is "five billion, four hundred fifty-one million, six hundred seventy-seven thousand, seven hundred twenty-one".