1986881750994 has 32 divisors (see below), whose sum is σ = 4605408009216. Its totient is φ = 559684999440.

The previous prime is 1986881750957. The next prime is 1986881750999. The reversal of 1986881750994 is 4990571886891.

It is a happy number.

It is a super-3 number, since 3×1986881750994³ (a number of 38 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1986881750999) 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, 333142852 + ... + 333148815.

It is an arithmetic number, because the mean of its divisors is an integer number (143919000288).

Almost surely, 2^{1986881750994} is an apocalyptic number.

1986881750994 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1986881750994 is an abundant number, since it is smaller than the sum of its proper divisors (2618526258222).

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

1986881750994 is a wasteful number, since it uses less digits than its factorization.

1986881750994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666291750.

The product of its (nonzero) digits is 313528320, while the sum is 75.

The spelling of 1986881750994 in words is "one trillion, nine hundred eighty-six billion, eight hundred eighty-one million, seven hundred fifty thousand, nine hundred ninety-four".