381451878126 has 80 divisors (see below), whose sum is σ = 935879839488. Its totient is φ = 115164795600.

The previous prime is 381451878109. The next prime is 381451878257. The reversal of 381451878126 is 621878154183.

381451878126 is a `hidden beast` number, since 38 + 1 + 4 + 518 + 78 + 1 + 26 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 87981 + ... + 877863.

Almost surely, 2^381451878126 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 381451878126, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (467939919744).

381451878126 is an abundant number, since it is smaller than the sum of its proper divisors (554427961362).

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

381451878126 is a wasteful number, since it uses less digits than its factorization.

381451878126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790179 (or 790170 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 54.

The spelling of 381451878126 in words is "three hundred eighty-one billion, four hundred fifty-one million, eight hundred seventy-eight thousand, one hundred twenty-six".