11001081554 has 4 divisors (see below), whose sum is σ = 16501622334. Its totient is φ = 5500540776.

The previous prime is 11001081547. The next prime is 11001081557. The reversal of 11001081554 is 45518010011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45518010011 = 84349 ⋅539639.

It can be written as a sum of positive squares in only one way, i.e., 9510735529 + 1490346025 = 97523^2 + 38605^2 .

It is not an unprimeable number, because it can be changed into a prime (11001081557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2750270387 + ... + 2750270390.

Almost surely, 2^11001081554 is an apocalyptic number.

11001081554 is a deficient number, since it is larger than the sum of its proper divisors (5500540780).

11001081554 is an equidigital number, since it uses as much as digits as its factorization.

11001081554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5500540779.

The product of its (nonzero) digits is 800, while the sum is 26.

Adding to 11001081554 its reverse (45518010011), we get a palindrome (56519091565).

The spelling of 11001081554 in words is "eleven billion, one million, eighty-one thousand, five hundred fifty-four".