9138251380 has 24 divisors (see below), whose sum is σ = 19658386440. Its totient is φ = 3566146560.

The previous prime is 9138251377. The next prime is 9138251399. The reversal of 9138251380 is 831528319.

It can be written as a sum of positive squares in 4 ways, for example, as 30603024 + 9107648356 = 5532^2 + 95434^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5571285 + ... + 5572924.

It is an arithmetic number, because the mean of its divisors is an integer number (819099435).

Almost surely, 2^9138251380 is an apocalyptic number.

It is an amenable number.

9138251380 is an abundant number, since it is smaller than the sum of its proper divisors (10520135060).

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

9138251380 is a wasteful number, since it uses less digits than its factorization.

9138251380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11144259 (or 11144257 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 9138251380 is about 95594.2016023985. The cubic root of 9138251380 is about 2090.6806525240.

Adding to 9138251380 its reverse (831528319), we get a palindrome (9969779699).

The spelling of 9138251380 in words is "nine billion, one hundred thirty-eight million, two hundred fifty-one thousand, three hundred eighty".