1158861431574 has 320 divisors, whose sum is σ = 3309224067072. Its totient is φ = 294398193600.

The previous prime is 1158861431549. The next prime is 1158861431579. The reversal of 1158861431574 is 4751341688511.

1158861431574 is a `hidden beast` number, since 1 + 1 + 5 + 8 + 8 + 61 + 4 + 3 + 1 + 574 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 1158861431574.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1158861431579) 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 159 ways as a sum of consecutive naturals, for example, 112472907 + ... + 112483209.

Almost surely, 2^{1158861431574} is an apocalyptic number.

1158861431574 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1158861431574, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1654612033536).

1158861431574 is an abundant number, since it is smaller than the sum of its proper divisors (2150362635498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1158861431574 is a wasteful number, since it uses less digits than its factorization.

1158861431574 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10533 (or 10524 counting only the distinct ones).

The product of its digits is 3225600, while the sum is 54.

The spelling of 1158861431574 in words is "one trillion, one hundred fifty-eight billion, eight hundred sixty-one million, four hundred thirty-one thousand, five hundred seventy-four".