381961779472 has 40 divisors (see below), whose sum is σ = 910831939136. Its totient is φ = 151105758336.

The previous prime is 381961779467. The next prime is 381961779487. The reversal of 381961779472 is 274977169183.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131166738 + ... + 131169649.

Almost surely, 2^381961779472 is an apocalyptic number.

It is an amenable number.

381961779472 is an abundant number, since it is smaller than the sum of its proper divisors (528870159664).

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

381961779472 is a wasteful number, since it uses less digits than its factorization.

381961779472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262336415 (or 262336409 counting only the distinct ones).

The product of its digits is 32006016, while the sum is 64.

The spelling of 381961779472 in words is "three hundred eighty-one billion, nine hundred sixty-one million, seven hundred seventy-nine thousand, four hundred seventy-two".