1984497001648 has 60 divisors (see below), whose sum is σ = 4667933334832. Its totient is φ = 800469365760.

The previous prime is 1984497001621. The next prime is 1984497001679. The reversal of 1984497001648 is 8461007944891.

It is a super-2 number, since 2×1984497001648² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30622863 + ... + 30687598.

Almost surely, 2^{1984497001648} is an apocalyptic number.

It is an amenable number.

1984497001648 is an abundant number, since it is smaller than the sum of its proper divisors (2683436333184).

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

1984497001648 is a wasteful number, since it uses less digits than its factorization.

1984497001648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61310510 (or 61310487 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 61.

The spelling of 1984497001648 in words is "one trillion, nine hundred eighty-four billion, four hundred ninety-seven million, one thousand, six hundred forty-eight".