1987727805336 has 64 divisors (see below), whose sum is σ = 6116085561600. Its totient is φ = 524235904128.

The previous prime is 1987727805331. The next prime is 1987727805337. The reversal of 1987727805336 is 6335087277891.

It is a happy number.

It is a super-2 number, since 2×1987727805336² (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 (1987727805331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 455063706 + ... + 455068073.

It is an arithmetic number, because the mean of its divisors is an integer number (95563836900).

Almost surely, 2^{1987727805336} is an apocalyptic number.

It is an amenable number.

1987727805336 is an abundant number, since it is smaller than the sum of its proper divisors (4128357756264).

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

1987727805336 is a wasteful number, since it uses less digits than its factorization.

1987727805336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910131808 (or 910131804 counting only the distinct ones).

The product of its (nonzero) digits is 106686720, while the sum is 66.

The spelling of 1987727805336 in words is "one trillion, nine hundred eighty-seven billion, seven hundred twenty-seven million, eight hundred five thousand, three hundred thirty-six".