13378887401 has 4 divisors (see below), whose sum is σ = 14595149904. Its totient is φ = 12162624900.

The previous prime is 13378887397. The next prime is 13378887439. The reversal of 13378887401 is 10478887331.

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.

It is a cyclic number.

It is not a de Polignac number, because 13378887401 - 2² = 13378887397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13378887401.

It is not an unprimeable number, because it can be changed into a prime (13378887491) 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, 608131235 + ... + 608131256.

It is an arithmetic number, because the mean of its divisors is an integer number (3648787476).

Almost surely, 2^13378887401 is an apocalyptic number.

13378887401 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13378887401 is a deficient number, since it is larger than the sum of its proper divisors (1216262503).

13378887401 is a wasteful number, since it uses less digits than its factorization.

13378887401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216262502.

The product of its (nonzero) digits is 903168, while the sum is 50.

The spelling of 13378887401 in words is "thirteen billion, three hundred seventy-eight million, eight hundred eighty-seven thousand, four hundred one".