13405345551 has 12 divisors (see below), whose sum is σ = 20852759928. Its totient is φ = 8249443344.

The previous prime is 13405345549. The next prime is 13405345559. The reversal of 13405345551 is 15554350431.

13405345551 is a `hidden beast` number, since 13 + 4 + 0 + 53 + 45 + 551 = 666.

It is not a de Polignac number, because 13405345551 - 2¹ = 13405345549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13405345559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57287685 + ... + 57287918.

It is an arithmetic number, because the mean of its divisors is an integer number (1737729994).

Almost surely, 2^13405345551 is an apocalyptic number.

13405345551 is a deficient number, since it is larger than the sum of its proper divisors (7447414377).

13405345551 is a wasteful number, since it uses less digits than its factorization.

13405345551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114575622 (or 114575619 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

Adding to 13405345551 its reverse (15554350431), we get a palindrome (28959695982).

The spelling of 13405345551 in words is "thirteen billion, four hundred five million, three hundred forty-five thousand, five hundred fifty-one".