13551772205 has 8 divisors (see below), whose sum is σ = 16270298232. Its totient is φ = 10835970048.

The previous prime is 13551772177. The next prime is 13551772231. The reversal of 13551772205 is 50227715531.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6622541641 + 6929230564 = 81379^2 + 83242^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13551772205 - 2¹⁴ = 13551755821 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 670004 + ... + 689933.

It is an arithmetic number, because the mean of its divisors is an integer number (2033787279).

Almost surely, 2^13551772205 is an apocalyptic number.

It is an amenable number.

13551772205 is a deficient number, since it is larger than the sum of its proper divisors (2718526027).

13551772205 is a wasteful number, since it uses less digits than its factorization.

13551772205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1361935.

The product of its (nonzero) digits is 73500, while the sum is 38.

The spelling of 13551772205 in words is "thirteen billion, five hundred fifty-one million, seven hundred seventy-two thousand, two hundred five".