1881640574648 has 16 divisors (see below), whose sum is σ = 3529145565000. Its totient is φ = 940535090656.

The previous prime is 1881640574587. The next prime is 1881640574657. The reversal of 1881640574648 is 8464750461881.

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, 35621543 + ... + 35674326.

Almost surely, 2^{1881640574648} is an apocalyptic number.

It is an amenable number.

1881640574648 is a deficient number, since it is larger than the sum of its proper divisors (1647504990352).

1881640574648 is a wasteful number, since it uses less digits than its factorization.

1881640574648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71299174 (or 71299170 counting only the distinct ones).

The product of its (nonzero) digits is 41287680, while the sum is 62.

The spelling of 1881640574648 in words is "one trillion, eight hundred eighty-one billion, six hundred forty million, five hundred seventy-four thousand, six hundred forty-eight".