2151378126 has 48 divisors (see below), whose sum is σ = 4717112400. Its totient is φ = 708580224.

The previous prime is 2151378091. The next prime is 2151378149. The reversal of 2151378126 is 6218731512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 820770 + ... + 823386.

It is an arithmetic number, because the mean of its divisors is an integer number (98273175).

Almost surely, 2^2151378126 is an apocalyptic number.

2151378126 is an abundant number, since it is smaller than the sum of its proper divisors (2565734274).

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

2151378126 is a wasteful number, since it uses less digits than its factorization.

2151378126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3153 (or 3150 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 2151378126 is about 46382.9508116937. The cubic root of 2151378126 is about 1290.9385886069.

The spelling of 2151378126 in words is "two billion, one hundred fifty-one million, three hundred seventy-eight thousand, one hundred twenty-six".