6113782557 has 18 divisors (see below), whose sum is σ = 9170217758. Its totient is φ = 4075850664.

The previous prime is 6113782541. The next prime is 6113782561. The reversal of 6113782557 is 7552873116.

It is a happy number.

6113782557 is a `hidden beast` number, since 6 + 1 + 13 + 7 + 82 + 557 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4136290596 + 1977491961 = 64314^2 + 44469^2 .

It is not a de Polignac number, because 6113782557 - 2⁴ = 6113782541 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 (6113782757) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 459358 + ... + 472479.

Almost surely, 2^6113782557 is an apocalyptic number.

It is an amenable number.

6113782557 is a deficient number, since it is larger than the sum of its proper divisors (3056435201).

6113782557 is an frugal number, since it uses more digits than its factorization.

6113782557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931861 (or 931840 counting only the distinct ones).

The product of its digits is 352800, while the sum is 45.

The square root of 6113782557 is about 78190.6807554455. The cubic root of 6113782557 is about 1828.5352186174.

The spelling of 6113782557 in words is "six billion, one hundred thirteen million, seven hundred eighty-two thousand, five hundred fifty-seven".