6551520743 has 4 divisors (see below), whose sum is σ = 6553769640. Its totient is φ = 6549271848.

The previous prime is 6551520709. The next prime is 6551520751. The reversal of 6551520743 is 3470251556.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6551520743 - 2¹⁴ = 6551504359 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6551520697 and 6551520706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6551520763) 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, 1120073 + ... + 1125906.

It is an arithmetic number, because the mean of its divisors is an integer number (1638442410).

Almost surely, 2^6551520743 is an apocalyptic number.

6551520743 is a deficient number, since it is larger than the sum of its proper divisors (2248897).

6551520743 is a wasteful number, since it uses less digits than its factorization.

6551520743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2248896.

The product of its (nonzero) digits is 126000, while the sum is 38.

The square root of 6551520743 is about 80941.4649175563. The cubic root of 6551520743 is about 1871.1734218755.

The spelling of 6551520743 in words is "six billion, five hundred fifty-one million, five hundred twenty thousand, seven hundred forty-three".