1156139546418 has 96 divisors (see below), whose sum is σ = 2637408563712. Its totient is φ = 365516236800.

The previous prime is 1156139546417. The next prime is 1156139546431. The reversal of 1156139546418 is 8146459316511.

1156139546418 is a `hidden beast` number, since 1 + 1 + 5 + 61 + 39 + 546 + 4 + 1 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (1156139546417) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27985938 + ... + 28027218.

It is an arithmetic number, because the mean of its divisors is an integer number (27473005872).

Almost surely, 2^{1156139546418} is an apocalyptic number.

1156139546418 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1156139546418, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1318704281856).

1156139546418 is an abundant number, since it is smaller than the sum of its proper divisors (1481269017294).

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

1156139546418 is a wasteful number, since it uses less digits than its factorization.

1156139546418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42320 (or 42317 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 54.

The spelling of 1156139546418 in words is "one trillion, one hundred fifty-six billion, one hundred thirty-nine million, five hundred forty-six thousand, four hundred eighteen".