387581312550 has 48 divisors (see below), whose sum is σ = 1011791223360. Its totient is φ = 97915278240.

The previous prime is 387581312537. The next prime is 387581312581. The reversal of 387581312550 is 55213185783.

It is a self number, because there is not a number n which added to its sum of digits gives 387581312550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67993872 + ... + 67999571.

It is an arithmetic number, because the mean of its divisors is an integer number (21078983820).

Almost surely, 2^387581312550 is an apocalyptic number.

387581312550 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

387581312550 is an abundant number, since it is smaller than the sum of its proper divisors (624209910810).

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

387581312550 is a wasteful number, since it uses less digits than its factorization.

387581312550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135993477 (or 135993472 counting only the distinct ones).

The product of its (nonzero) digits is 1008000, while the sum is 48.

The spelling of 387581312550 in words is "three hundred eighty-seven billion, five hundred eighty-one million, three hundred twelve thousand, five hundred fifty".