381994749550 has 24 divisors (see below), whose sum is σ = 710537832936. Its totient is φ = 152791964640.

The previous prime is 381994749527. The next prime is 381994749553. The reversal of 381994749550 is 55947499183.

It is a hoax number, since the sum of its digits (64) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381994749553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1289709 + ... + 1557991.

It is an arithmetic number, because the mean of its divisors is an integer number (29605743039).

Almost surely, 2^381994749550 is an apocalyptic number.

381994749550 is a deficient number, since it is larger than the sum of its proper divisors (328543083386).

381994749550 is a wasteful number, since it uses less digits than its factorization.

381994749550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296772 (or 296767 counting only the distinct ones).

The product of its (nonzero) digits is 48988800, while the sum is 64.

The spelling of 381994749550 in words is "three hundred eighty-one billion, nine hundred ninety-four million, seven hundred forty-nine thousand, five hundred fifty".