11865742758 has 64 divisors (see below), whose sum is σ = 27244039680. Its totient is φ = 3825680544.

The previous prime is 11865742751. The next prime is 11865742769. The reversal of 11865742758 is 85724756811.

11865742758 is a `hidden beast` number, since 1 + 18 + 6 + 574 + 2 + 7 + 58 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11865742751) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 214360 + ... + 263972.

It is an arithmetic number, because the mean of its divisors is an integer number (425688120).

Almost surely, 2^11865742758 is an apocalyptic number.

11865742758 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 11865742758, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13622019840).

11865742758 is an abundant number, since it is smaller than the sum of its proper divisors (15378296922).

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

11865742758 is a wasteful number, since it uses less digits than its factorization.

11865742758 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49770 (or 49764 counting only the distinct ones).

The product of its digits is 3763200, while the sum is 54.

The spelling of 11865742758 in words is "eleven billion, eight hundred sixty-five million, seven hundred forty-two thousand, seven hundred fifty-eight".