13445557507 has 6 divisors (see below), whose sum is σ = 13781498204. Its totient is φ = 13117615440.

The previous prime is 13445557501. The next prime is 13445557519. The reversal of 13445557507 is 70575554431.

It is not a de Polignac number, because 13445557507 - 2³¹ = 11298073859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13445557501) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3997593 + ... + 4000954.

Almost surely, 2^13445557507 is an apocalyptic number.

13445557507 is a deficient number, since it is larger than the sum of its proper divisors (335940697).

13445557507 is an frugal number, since it uses more digits than its factorization.

13445557507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7998629 (or 7998588 counting only the distinct ones).

The product of its (nonzero) digits is 1470000, while the sum is 46.

The spelling of 13445557507 in words is "thirteen billion, four hundred forty-five million, five hundred fifty-seven thousand, five hundred seven".