11747438537 has 4 divisors (see below), whose sum is σ = 11815342980. Its totient is φ = 11679534096.

The previous prime is 11747438509. The next prime is 11747438567. The reversal of 11747438537 is 73583474711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73583474711 = 193 ⋅381261527.

It can be written as a sum of positive squares in 2 ways, for example, as 4230721936 + 7516716601 = 65044^2 + 86699^2 .

It is a cyclic number.

It is not a de Polignac number, because 11747438537 - 2⁶ = 11747438473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11747438567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33951962 + ... + 33952307.

It is an arithmetic number, because the mean of its divisors is an integer number (2953835745).

Almost surely, 2^11747438537 is an apocalyptic number.

It is an amenable number.

11747438537 is a deficient number, since it is larger than the sum of its proper divisors (67904443).

11747438537 is an equidigital number, since it uses as much as digits as its factorization.

11747438537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67904442.

The product of its digits is 1975680, while the sum is 50.

The spelling of 11747438537 in words is "eleven billion, seven hundred forty-seven million, four hundred thirty-eight thousand, five hundred thirty-seven".