11573538740 has 24 divisors (see below), whose sum is σ = 24322190760. Its totient is φ = 4626032768.

The previous prime is 11573538733. The next prime is 11573538787. The reversal of 11573538740 is 4783537511.

It can be written as a sum of positive squares in 4 ways, for example, as 2946101284 + 8627437456 = 54278^2 + 92884^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11573538691 and 11573538700.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183275 + ... + 238194.

It is an arithmetic number, because the mean of its divisors is an integer number (1013424615).

Almost surely, 2^11573538740 is an apocalyptic number.

11573538740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11573538740 is an abundant number, since it is smaller than the sum of its proper divisors (12748652020).

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

11573538740 is a wasteful number, since it uses less digits than its factorization.

11573538740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422851 (or 422849 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 44.

The spelling of 11573538740 in words is "eleven billion, five hundred seventy-three million, five hundred thirty-eight thousand, seven hundred forty".