11801427136 has 28 divisors (see below), whose sum is σ = 24651009880. Its totient is φ = 5590149120.

The previous prime is 11801427133. The next prime is 11801427139. The reversal of 11801427136 is 63172410811.

It is an interprime number because it is at equal distance from previous prime (11801427133) and next prime (11801427139).

It is not an unprimeable number, because it can be changed into a prime (11801427133) 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, 4851345 + ... + 4853776.

It is an arithmetic number, because the mean of its divisors is an integer number (880393210).

Almost surely, 2^11801427136 is an apocalyptic number.

11801427136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11801427136 is an abundant number, since it is smaller than the sum of its proper divisors (12849582744).

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

11801427136 is an equidigital number, since it uses as much as digits as its factorization.

11801427136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9705152 (or 9705142 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 34.

Adding to 11801427136 its reverse (63172410811), we get a palindrome (74973837947).

The spelling of 11801427136 in words is "eleven billion, eight hundred one million, four hundred twenty-seven thousand, one hundred thirty-six".