381071515151236 has 144 divisors (see below), whose sum is σ = 836627429789424. Its totient is φ = 150536827413504.

The previous prime is 381071515151231. The next prime is 381071515151237. The reversal of 381071515151236 is 632151515170183.

It can be written as a sum of positive squares in 8 ways, for example, as 35033613966400 + 346037901184836 = 5918920^2 + 18602094^2 .

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a self number, because there is not a number n which added to its sum of digits gives 381071515151236.

It is not an unprimeable number, because it can be changed into a prime (381071515151231) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25315312686 + ... + 25315327738.

It is an arithmetic number, because the mean of its divisors is an integer number (5809912706871).

Almost surely, 2^{381071515151236} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 381071515151236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (418313714894712).

381071515151236 is an abundant number, since it is smaller than the sum of its proper divisors (455555914638188).

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

381071515151236 is a wasteful number, since it uses less digits than its factorization.

381071515151236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28710 (or 28701 counting only the distinct ones).

The product of its (nonzero) digits is 756000, while the sum is 49.

The spelling of 381071515151236 in words is "three hundred eighty-one trillion, seventy-one billion, five hundred fifteen million, one hundred fifty-one thousand, two hundred thirty-six".