5515731643 has 4 divisors (see below), whose sum is σ = 5609218680. Its totient is φ = 5422244608.

The previous prime is 5515731601. The next prime is 5515731649. The reversal of 5515731643 is 3461375155.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5515731643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5515731596 and 5515731605.

It is not an unprimeable number, because it can be changed into a prime (5515731649) 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, 46743430 + ... + 46743547.

It is an arithmetic number, because the mean of its divisors is an integer number (1402304670).

Almost surely, 2^5515731643 is an apocalyptic number.

5515731643 is a deficient number, since it is larger than the sum of its proper divisors (93487037).

5515731643 is an equidigital number, since it uses as much as digits as its factorization.

5515731643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93487036.

The product of its digits is 189000, while the sum is 40.

The square root of 5515731643 is about 74267.9718519363. The cubic root of 5515731643 is about 1766.8555407458.

The spelling of 5515731643 in words is "five billion, five hundred fifteen million, seven hundred thirty-one thousand, six hundred forty-three".