381528507450 has 48 divisors (see below), whose sum is σ = 959517354816. Its totient is φ = 100307961600.

The previous prime is 381528507439. The next prime is 381528507461. The reversal of 381528507450 is 54705825183.

It is an interprime number because it is at equal distance from previous prime (381528507439) and next prime (381528507461).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 381528507450.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17901487 + ... + 17922786.

It is an arithmetic number, because the mean of its divisors is an integer number (19989944892).

Almost surely, 2^381528507450 is an apocalyptic number.

381528507450 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

381528507450 is an abundant number, since it is smaller than the sum of its proper divisors (577988847366).

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

381528507450 is a wasteful number, since it uses less digits than its factorization.

381528507450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35824359 (or 35824354 counting only the distinct ones).

The product of its (nonzero) digits is 1344000, while the sum is 48.

The spelling of 381528507450 in words is "three hundred eighty-one billion, five hundred twenty-eight million, five hundred seven thousand, four hundred fifty".