1988485090266 has 32 divisors (see below), whose sum is σ = 4195734359040. Its totient is φ = 626525166384.

The previous prime is 1988485090259. The next prime is 1988485090271. The reversal of 1988485090266 is 6620905848891.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 1988485090197 and 1988485090206.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19636690 + ... + 19737693.

It is an arithmetic number, because the mean of its divisors is an integer number (131116698720).

Almost surely, 2^{1988485090266} is an apocalyptic number.

1988485090266 is an abundant number, since it is smaller than the sum of its proper divisors (2207249268774).

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

1988485090266 is a wasteful number, since it uses less digits than its factorization.

1988485090266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39374850.

The product of its (nonzero) digits is 59719680, while the sum is 66.

The spelling of 1988485090266 in words is "one trillion, nine hundred eighty-eight billion, four hundred eighty-five million, ninety thousand, two hundred sixty-six".