1156557357 has 6 divisors (see below), whose sum is σ = 1670582862. Its totient is φ = 771038232.

The previous prime is 1156557301. The next prime is 1156557407. The reversal of 1156557357 is 7537556511.

1156557357 is a `hidden beast` number, since 1 + 1 + 565 + 57 + 35 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 752185476 + 404371881 = 27426^2 + 20109^2 .

It is not a de Polignac number, because 1156557357 - 2⁶ = 1156557293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156557557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 64253178 + ... + 64253195.

It is an arithmetic number, because the mean of its divisors is an integer number (278430477).

Almost surely, 2^1156557357 is an apocalyptic number.

It is an amenable number.

1156557357 is a deficient number, since it is larger than the sum of its proper divisors (514025505).

1156557357 is a wasteful number, since it uses less digits than its factorization.

1156557357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128506379 (or 128506376 counting only the distinct ones).

The product of its digits is 551250, while the sum is 45.

The square root of 1156557357 is about 34008.1954387468. The cubic root of 1156557357 is about 1049.6771061567.

The spelling of 1156557357 in words is "one billion, one hundred fifty-six million, five hundred fifty-seven thousand, three hundred fifty-seven".