378681531640 has 16 divisors (see below), whose sum is σ = 852033446280. Its totient is φ = 151472612640.

The previous prime is 378681531623. The next prime is 378681531691. The reversal of 378681531640 is 46135186873.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4733519106 + ... + 4733519185.

Almost surely, 2^378681531640 is an apocalyptic number.

It is an amenable number.

378681531640 is an abundant number, since it is smaller than the sum of its proper divisors (473351914640).

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

378681531640 is a wasteful number, since it uses less digits than its factorization.

378681531640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9467038302 (or 9467038298 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 52.

The spelling of 378681531640 in words is "three hundred seventy-eight billion, six hundred eighty-one million, five hundred thirty-one thousand, six hundred forty".