1987551554488 has 16 divisors (see below), whose sum is σ = 3922799121000. Its totient is φ = 941471788896.

The previous prime is 1987551554473. The next prime is 1987551554489. The reversal of 1987551554488 is 8844551557891.

It is a super-2 number, since 2×1987551554488² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1987551554489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6537998383 + ... + 6537998686.

Almost surely, 2^{1987551554488} is an apocalyptic number.

It is an amenable number.

1987551554488 is a deficient number, since it is larger than the sum of its proper divisors (1935247566512).

1987551554488 is a wasteful number, since it uses less digits than its factorization.

1987551554488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13075997094 (or 13075997090 counting only the distinct ones).

The product of its digits is 322560000, while the sum is 70.

The spelling of 1987551554488 in words is "one trillion, nine hundred eighty-seven billion, five hundred fifty-one million, five hundred fifty-four thousand, four hundred eighty-eight".