13406401551 has 4 divisors (see below), whose sum is σ = 17875202072. Its totient is φ = 8937601032.

The previous prime is 13406401537. The next prime is 13406401553. The reversal of 13406401551 is 15510460431.

It is a happy number.

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

It is not a de Polignac number, because 13406401551 - 2⁷ = 13406401423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13406401553) 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, 2234400256 + ... + 2234400261.

It is an arithmetic number, because the mean of its divisors is an integer number (4468800518).

Almost surely, 2^13406401551 is an apocalyptic number.

13406401551 is a deficient number, since it is larger than the sum of its proper divisors (4468800521).

13406401551 is an equidigital number, since it uses as much as digits as its factorization.

13406401551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4468800520.

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 13406401551 its reverse (15510460431), we get a palindrome (28916861982).

The spelling of 13406401551 in words is "thirteen billion, four hundred six million, four hundred one thousand, five hundred fifty-one".