6381077697440 has 24 divisors (see below), whose sum is σ = 15075296060580. Its totient is φ = 2552431078912.

The previous prime is 6381077697431. The next prime is 6381077697451. The reversal of 6381077697440 is 447967701836.

It can be written as a sum of positive squares in 2 ways, for example, as 5405494800784 + 975582896656 = 2324972^2 + 987716^2 .

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, 19940867645 + ... + 19940867964.

Almost surely, 2^{6381077697440} is an apocalyptic number.

It is an amenable number.

6381077697440 is an abundant number, since it is smaller than the sum of its proper divisors (8694218363140).

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

6381077697440 is a wasteful number, since it uses less digits than its factorization.

6381077697440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39881735624 (or 39881735616 counting only the distinct ones).

The product of its (nonzero) digits is 42674688, while the sum is 62.

The spelling of 6381077697440 in words is "six trillion, three hundred eighty-one billion, seventy-seven million, six hundred ninety-seven thousand, four hundred forty".