8047551557 has 4 divisors (see below), whose sum is σ = 8050133196. Its totient is φ = 8044969920.

The previous prime is 8047551527. The next prime is 8047551559. The reversal of 8047551557 is 7551557408.

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

It can be written as a sum of positive squares in 2 ways, for example, as 722588161 + 7324963396 = 26881^2 + 85586^2 .

It is a cyclic number.

It is not a de Polignac number, because 8047551557 - 2¹² = 8047547461 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 (8047551559) 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, 1286138 + ... + 1292379.

It is an arithmetic number, because the mean of its divisors is an integer number (2012533299).

Almost surely, 2^8047551557 is an apocalyptic number.

It is an amenable number.

8047551557 is a deficient number, since it is larger than the sum of its proper divisors (2581639).

8047551557 is a wasteful number, since it uses less digits than its factorization.

8047551557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2581638.

The product of its (nonzero) digits is 980000, while the sum is 47.

The square root of 8047551557 is about 89708.1465475684. The cubic root of 8047551557 is about 2003.9548043567.

The spelling of 8047551557 in words is "eight billion, forty-seven million, five hundred fifty-one thousand, five hundred fifty-seven".