5451683781 has 4 divisors (see below), whose sum is σ = 7268911712. Its totient is φ = 3634455852.

The previous prime is 5451683759. The next prime is 5451683789. The reversal of 5451683781 is 1873861545.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 5451683781 - 2⁶ = 5451683717 is a prime.

It is a super-2 number, since 2×5451683781² = 59441712096036911922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5451683781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5451683789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 908613961 + ... + 908613966.

It is an arithmetic number, because the mean of its divisors is an integer number (1817227928).

Almost surely, 2^5451683781 is an apocalyptic number.

It is an amenable number.

5451683781 is a deficient number, since it is larger than the sum of its proper divisors (1817227931).

5451683781 is a wasteful number, since it uses less digits than its factorization.

5451683781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1817227930.

The product of its digits is 806400, while the sum is 48.

The square root of 5451683781 is about 73835.5184244006. The cubic root of 5451683781 is about 1759.9900762397.

The spelling of 5451683781 in words is "five billion, four hundred fifty-one million, six hundred eighty-three thousand, seven hundred eighty-one".