16135806544 has 80 divisors (see below), whose sum is σ = 38661900480. Its totient is φ = 6413921280.

The previous prime is 16135806541. The next prime is 16135806613. The reversal of 16135806544 is 44560853161.

It is a self number, because there is not a number n which added to its sum of digits gives 16135806544.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16135806541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142117 + ... + 229060.

It is an arithmetic number, because the mean of its divisors is an integer number (483273756).

Almost surely, 2^16135806544 is an apocalyptic number.

It is an amenable number.

16135806544 is an abundant number, since it is smaller than the sum of its proper divisors (22526093936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16135806544 is a wasteful number, since it uses less digits than its factorization.

16135806544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371228 (or 371222 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 43.

The spelling of 16135806544 in words is "sixteen billion, one hundred thirty-five million, eight hundred six thousand, five hundred forty-four".