1987650884772 has 120 divisors (see below), whose sum is σ = 6027047256384. Its totient is φ = 559424086848.

The previous prime is 1987650884761. The next prime is 1987650884881. The reversal of 1987650884772 is 2774880567891.

1987650884772 is a `hidden beast` number, since 1 + 9 + 8 + 7 + 6 + 508 + 8 + 47 + 72 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1987650884772.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6388263 + ... + 6692174.

Almost surely, 2^{1987650884772} is an apocalyptic number.

1987650884772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1987650884772 is an abundant number, since it is smaller than the sum of its proper divisors (4039396371612).

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

1987650884772 is a wasteful number, since it uses less digits than its factorization.

1987650884772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13080527 (or 13080516 counting only the distinct ones).

The product of its (nonzero) digits is 379330560, while the sum is 72.

The spelling of 1987650884772 in words is "one trillion, nine hundred eighty-seven billion, six hundred fifty million, eight hundred eighty-four thousand, seven hundred seventy-two".