1157631455 has 16 divisors (see below), whose sum is σ = 1411538400. Its totient is φ = 911285760.

The previous prime is 1157631451. The next prime is 1157631457. The reversal of 1157631455 is 5541367511.

It is a happy number.

It is not a de Polignac number, because 1157631455 - 2² = 1157631451 is a prime.

It is a super-2 number, since 2×1157631455² = 2680221171210834050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157631451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87731 + ... + 100059.

It is an arithmetic number, because the mean of its divisors is an integer number (88221150).

Almost surely, 2^1157631455 is an apocalyptic number.

1157631455 is a deficient number, since it is larger than the sum of its proper divisors (253906945).

1157631455 is a wasteful number, since it uses less digits than its factorization.

1157631455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12634.

The product of its digits is 63000, while the sum is 38.

The square root of 1157631455 is about 34023.9835263304. The cubic root of 1157631455 is about 1050.0019516215.

Adding to 1157631455 its reverse (5541367511), we get a palindrome (6698998966).

The spelling of 1157631455 in words is "one billion, one hundred fifty-seven million, six hundred thirty-one thousand, four hundred fifty-five".