381450661548 has 48 divisors (see below), whose sum is σ = 974994303360. Its totient is φ = 115111468800.

The previous prime is 381450661507. The next prime is 381450661561. The reversal of 381450661548 is 845166054183.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 381450661548.

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 15 ways as a sum of consecutive naturals, for example, 5963578 + ... + 6027201.

It is an arithmetic number, because the mean of its divisors is an integer number (20312381320).

Almost surely, 2^381450661548 is an apocalyptic number.

It is an amenable number.

381450661548 is an abundant number, since it is smaller than the sum of its proper divisors (593543641812).

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

381450661548 is a wasteful number, since it uses less digits than its factorization.

381450661548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11991038 (or 11991036 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 51.

The spelling of 381450661548 in words is "three hundred eighty-one billion, four hundred fifty million, six hundred sixty-one thousand, five hundred forty-eight".