4781581557 has 8 divisors (see below), whose sum is σ = 6375770400. Its totient is φ = 3187556880.

The previous prime is 4781581547. The next prime is 4781581561. The reversal of 4781581557 is 7551851874.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4781581557 - 2¹⁰ = 4781580533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4781581537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69319 + ... + 119867.

It is an arithmetic number, because the mean of its divisors is an integer number (796971300).

Almost surely, 2^4781581557 is an apocalyptic number.

It is an amenable number.

4781581557 is a deficient number, since it is larger than the sum of its proper divisors (1594188843).

4781581557 is a wasteful number, since it uses less digits than its factorization.

4781581557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82083.

The product of its digits is 1568000, while the sum is 51.

The square root of 4781581557 is about 69148.9808818612. The cubic root of 4781581557 is about 1684.7049654996.

The spelling of 4781581557 in words is "four billion, seven hundred eighty-one million, five hundred eighty-one thousand, five hundred fifty-seven".