11173743540 has 144 divisors (see below), whose sum is σ = 35467600896. Its totient is φ = 2843942400.

The previous prime is 11173743523. The next prime is 11173743557. The reversal of 11173743540 is 4534737111.

It is a happy number.

11173743540 is a `hidden beast` number, since 1 + 1 + 1 + 73 + 7 + 43 + 540 = 666.

It is an interprime number because it is at equal distance from previous prime (11173743523) and next prime (11173743557).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 11173743495 and 11173743504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 393625 + ... + 421055.

It is an arithmetic number, because the mean of its divisors is an integer number (246302784).

Almost surely, 2^11173743540 is an apocalyptic number.

11173743540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11173743540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17733800448).

11173743540 is an abundant number, since it is smaller than the sum of its proper divisors (24293857356).

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

11173743540 is a wasteful number, since it uses less digits than its factorization.

11173743540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27550 (or 27545 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The spelling of 11173743540 in words is "eleven billion, one hundred seventy-three million, seven hundred forty-three thousand, five hundred forty".