13611377554 has 4 divisors (see below), whose sum is σ = 20417066334. Its totient is φ = 6805688776.

The previous prime is 13611377543. The next prime is 13611377623. The reversal of 13611377554 is 45577311631.

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

It can be written as a sum of positive squares in only one way, i.e., 9119295025 + 4492082529 = 95495^2 + 67023^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13611377554.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3402844387 + ... + 3402844390.

Almost surely, 2^13611377554 is an apocalyptic number.

13611377554 is a deficient number, since it is larger than the sum of its proper divisors (6805688780).

13611377554 is an equidigital number, since it uses as much as digits as its factorization.

13611377554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6805688779.

The product of its digits is 264600, while the sum is 43.

The spelling of 13611377554 in words is "thirteen billion, six hundred eleven million, three hundred seventy-seven thousand, five hundred fifty-four".