13905581416 has 8 divisors (see below), whose sum is σ = 26072965170. Its totient is φ = 6952790704.

The previous prime is 13905581413. The next prime is 13905581419. The reversal of 13905581416 is 61418550931.

It is an interprime number because it is at equal distance from previous prime (13905581413) and next prime (13905581419).

It can be written as a sum of positive squares in only one way, i.e., 13043924100 + 861657316 = 114210^2 + 29354^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (13905581413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 869098831 + ... + 869098846.

Almost surely, 2^13905581416 is an apocalyptic number.

It is an amenable number.

13905581416 is a deficient number, since it is larger than the sum of its proper divisors (12167383754).

13905581416 is a wasteful number, since it uses less digits than its factorization.

13905581416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1738197683 (or 1738197679 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 43.

The spelling of 13905581416 in words is "thirteen billion, nine hundred five million, five hundred eighty-one thousand, four hundred sixteen".