13539220000 has 60 divisors (see below), whose sum is σ = 33308561286. Its totient is φ = 5415680000.

The previous prime is 13539219973. The next prime is 13539220001. The reversal of 13539220000 is 2293531.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 501264 + 13538718736 = 708^2 + 116356^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (13539220001) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 318481 + ... + 358480.

Almost surely, 2^13539220000 is an apocalyptic number.

13539220000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13539220000 is an abundant number, since it is smaller than the sum of its proper divisors (19769341286).

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

13539220000 is an frugal number, since it uses more digits than its factorization.

13539220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676991 (or 676968 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 25.

The spelling of 13539220000 in words is "thirteen billion, five hundred thirty-nine million, two hundred twenty thousand".