1986623454882 has 16 divisors (see below), whose sum is σ = 4334451174432. Its totient is φ = 602007107520.

The previous prime is 1986623454833. The next prime is 1986623454899. The reversal of 1986623454882 is 2884543266891.

It is a Harshad number since it is a multiple of its sum of digits (66), and also a Moran number because the ratio is a prime number: 30100355377 = 1986623454882 / (1 + 9 + 8 + 6 + 6 + 2 + 3 + 4 + 5 + 4 + 8 + 8 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15050177623 + ... + 15050177754.

It is an arithmetic number, because the mean of its divisors is an integer number (270903198402).

Almost surely, 2^{1986623454882} is an apocalyptic number.

1986623454882 is an abundant number, since it is smaller than the sum of its proper divisors (2347827719550).

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

1986623454882 is a wasteful number, since it uses less digits than its factorization.

1986623454882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30100355393.

The product of its digits is 159252480, while the sum is 66.

The spelling of 1986623454882 in words is "one trillion, nine hundred eighty-six billion, six hundred twenty-three million, four hundred fifty-four thousand, eight hundred eighty-two".