1987767253924 has 27 divisors (see below), whose sum is σ = 3490222713187. Its totient is φ = 990571814144.

The previous prime is 1987767253873. The next prime is 1987767253939. The reversal of 1987767253924 is 4293527677891.

The square root of 1987767253924 is 1409882.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 866794516324 + 1120972737600 = 931018^2 + 1058760^2 .

It is a super-3 number, since 3×1987767253924³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

Its product of digits (320060160) is a multiple of the sum of its prime divisors (2352).

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 995375694 + ... + 995377690.

Almost surely, 2^{1987767253924} is an apocalyptic number.

1987767253924 is the 1409882-nd square number.

It is an amenable number.

1987767253924 is a deficient number, since it is larger than the sum of its proper divisors (1502455459263).

1987767253924 is an frugal number, since it uses more digits than its factorization.

1987767253924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4704 (or 2352 counting only the distinct ones).

The product of its digits is 320060160, while the sum is 70.

The spelling of 1987767253924 in words is "one trillion, nine hundred eighty-seven billion, seven hundred sixty-seven million, two hundred fifty-three thousand, nine hundred twenty-four".