1157128617 has 8 divisors (see below), whose sum is σ = 1558744096. Its totient is φ = 763466112.

The previous prime is 1157128603. The next prime is 1157128649. The reversal of 1157128617 is 7168217511.

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

It is not a de Polignac number, because 1157128617 - 2⁴ = 1157128601 is a prime.

It is a super-3 number, since 3×1157128617³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1157128697) 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, 1987903 + ... + 1988484.

It is an arithmetic number, because the mean of its divisors is an integer number (194843012).

Almost surely, 2^1157128617 is an apocalyptic number.

It is an amenable number.

1157128617 is a deficient number, since it is larger than the sum of its proper divisors (401615479).

1157128617 is an equidigital number, since it uses as much as digits as its factorization.

1157128617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3976487.

The product of its digits is 23520, while the sum is 39.

The square root of 1157128617 is about 34016.5932597607. The cubic root of 1157128617 is about 1049.8499005395.

The spelling of 1157128617 in words is "one billion, one hundred fifty-seven million, one hundred twenty-eight thousand, six hundred seventeen".