1984974680538 has 48 divisors (see below), whose sum is σ = 4342427781120. Its totient is φ = 655269356448.

The previous prime is 1984974680519. The next prime is 1984974680561. The reversal of 1984974680538 is 8350864794891.

1984974680538 is a `hidden beast` number, since 1 + 9 + 8 + 4 + 9 + 7 + 4 + 6 + 80 + 538 = 666.

It is a super-4 number, since 4×1984974680538⁴ (a number of 50 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 493843 + ... + 2052761.

It is an arithmetic number, because the mean of its divisors is an integer number (90467245440).

Almost surely, 2^{1984974680538} is an apocalyptic number.

1984974680538 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1984974680538 is an abundant number, since it is smaller than the sum of its proper divisors (2357453100582).

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

1984974680538 is a wasteful number, since it uses less digits than its factorization.

1984974680538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1559611 (or 1559608 counting only the distinct ones).

The product of its (nonzero) digits is 418037760, while the sum is 72.

The spelling of 1984974680538 in words is "one trillion, nine hundred eighty-four billion, nine hundred seventy-four million, six hundred eighty thousand, five hundred thirty-eight".