13642155816 has 32 divisors (see below), whose sum is σ = 34302540960. Its totient is φ = 4521098432.

The previous prime is 13642155803. The next prime is 13642155817. The reversal of 13642155816 is 61855124631.

It is a super-2 number, since 2×13642155816² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13642155817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1638690 + ... + 1646993.

It is an arithmetic number, because the mean of its divisors is an integer number (1071954405).

Almost surely, 2^13642155816 is an apocalyptic number.

It is an amenable number.

13642155816 is an abundant number, since it is smaller than the sum of its proper divisors (20660385144).

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

13642155816 is a wasteful number, since it uses less digits than its factorization.

13642155816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3285865 (or 3285861 counting only the distinct ones).

The product of its digits is 172800, while the sum is 42.

The spelling of 13642155816 in words is "thirteen billion, six hundred forty-two million, one hundred fifty-five thousand, eight hundred sixteen".