13538623380 has 48 divisors (see below), whose sum is σ = 38932696320. Its totient is φ = 3512723328.

The previous prime is 13538623379. The next prime is 13538623381. The reversal of 13538623380 is 8332683531.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (13538623379) and next prime (13538623381).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13538623381) 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, 3047020 + ... + 3051459.

It is an arithmetic number, because the mean of its divisors is an integer number (811097840).

Almost surely, 2^13538623380 is an apocalyptic number.

13538623380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13538623380 is an abundant number, since it is smaller than the sum of its proper divisors (25394072940).

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

13538623380 is a wasteful number, since it uses less digits than its factorization.

13538623380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6098528 (or 6098526 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 42.

It can be divided in two parts, 135386 and 23380, that added together give a triangular number (158766 = T₅₆₃).

The spelling of 13538623380 in words is "thirteen billion, five hundred thirty-eight million, six hundred twenty-three thousand, three hundred eighty".