381550207540 has 24 divisors (see below), whose sum is σ = 801270235080. Its totient is φ = 152617264128.

The previous prime is 381550207523. The next prime is 381550207547. The reversal of 381550207540 is 45702055183.

It can be written as a sum of positive squares in 4 ways, for example, as 8439361956 + 373110845584 = 91866^2 + 610828^2 .

It is a junction number, because it is equal to n+sod(n) for n = 381550207493 and 381550207502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381550207547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1193404 + ... + 1478956.

It is an arithmetic number, because the mean of its divisors is an integer number (33386259795).

Almost surely, 2^381550207540 is an apocalyptic number.

It is an amenable number.

381550207540 is an abundant number, since it is smaller than the sum of its proper divisors (419720027540).

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

381550207540 is a wasteful number, since it uses less digits than its factorization.

381550207540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352371 (or 352369 counting only the distinct ones).

The product of its (nonzero) digits is 168000, while the sum is 40.

The spelling of 381550207540 in words is "three hundred eighty-one billion, five hundred fifty million, two hundred seven thousand, five hundred forty".