1987766524799 has 12 divisors (see below), whose sum is σ = 2279896067568. Its totient is φ = 1728492627840.

The previous prime is 1987766524759. The next prime is 1987766524813. The reversal of 1987766524799 is 9974256677891.

It is not a de Polignac number, because 1987766524799 - 2¹² = 1987766520703 is a prime.

It is a super-2 number, since 2×1987766524799² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1987766524729) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 357123794 + ... + 357129359.

It is an arithmetic number, because the mean of its divisors is an integer number (189991338964).

Almost surely, 2^{1987766524799} is an apocalyptic number.

1987766524799 is a deficient number, since it is larger than the sum of its proper divisors (292129542769).

1987766524799 is a wasteful number, since it uses less digits than its factorization.

1987766524799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714253198 (or 714253187 counting only the distinct ones).

The product of its digits is 2880541440, while the sum is 80.

The spelling of 1987766524799 in words is "one trillion, nine hundred eighty-seven billion, seven hundred sixty-six million, five hundred twenty-four thousand, seven hundred ninety-nine".