1987105161763 has 16 divisors (see below), whose sum is σ = 2099505070080. Its totient is φ = 1877636059936.

The previous prime is 1987105161761. The next prime is 1987105161859. The reversal of 1987105161763 is 3671615017891.

It is a cyclic number.

It is not a de Polignac number, because 1987105161763 - 2¹ = 1987105161761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1987105161761) 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, 24557670 + ... + 24638452.

It is an arithmetic number, because the mean of its divisors is an integer number (131219066880).

Almost surely, 2^{1987105161763} is an apocalyptic number.

1987105161763 is a deficient number, since it is larger than the sum of its proper divisors (112399908317).

1987105161763 is a wasteful number, since it uses less digits than its factorization.

1987105161763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98906.

The product of its (nonzero) digits is 1905120, while the sum is 55.

The spelling of 1987105161763 in words is "one trillion, nine hundred eighty-seven billion, one hundred five million, one hundred sixty-one thousand, seven hundred sixty-three".