11385478537 has 4 divisors (see below), whose sum is σ = 11403241236. Its totient is φ = 11367715840.

The previous prime is 11385478523. The next prime is 11385478549. The reversal of 11385478537 is 73587458311.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10375255881 + 1010222656 = 101859^2 + 31784^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11385478537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11385478337) 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, 8880388 + ... + 8881669.

It is an arithmetic number, because the mean of its divisors is an integer number (2850810309).

Almost surely, 2^11385478537 is an apocalyptic number.

It is an amenable number.

11385478537 is a deficient number, since it is larger than the sum of its proper divisors (17762699).

11385478537 is an equidigital number, since it uses as much as digits as its factorization.

11385478537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17762698.

The product of its digits is 2822400, while the sum is 52.

The spelling of 11385478537 in words is "eleven billion, three hundred eighty-five million, four hundred seventy-eight thousand, five hundred thirty-seven".