12405553357 has 4 divisors (see below), whose sum is σ = 12521493216. Its totient is φ = 12289613500.

The previous prime is 12405553343. The next prime is 12405553409. The reversal of 12405553357 is 75335550421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75335550421 = 353 ⋅213415157.

It is a cyclic number.

It is not a de Polignac number, because 12405553357 - 2¹¹ = 12405551309 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 (12405556357) 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, 57969769 + ... + 57969982.

It is an arithmetic number, because the mean of its divisors is an integer number (3130373304).

Almost surely, 2^12405553357 is an apocalyptic number.

It is an amenable number.

12405553357 is a deficient number, since it is larger than the sum of its proper divisors (115939859).

12405553357 is a wasteful number, since it uses less digits than its factorization.

12405553357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115939858.

The product of its (nonzero) digits is 315000, while the sum is 40.

The spelling of 12405553357 in words is "twelve billion, four hundred five million, five hundred fifty-three thousand, three hundred fifty-seven".