1981470889152 has 168 divisors, whose sum is σ = 6071014141920. Its totient is φ = 616364052480.

The previous prime is 1981470889147. The next prime is 1981470889213. The reversal of 1981470889152 is 2519880741891.

1981470889152 is a `hidden beast` number, since 1 + 9 + 8 + 1 + 470 + 8 + 8 + 9 + 152 = 666.

It is a super-3 number, since 3×1981470889152³ (a number of 38 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1981470889152.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1280827 + ... + 2367162.

It is an arithmetic number, because the mean of its divisors is an integer number (36136988940).

Almost surely, 2^{1981470889152} is an apocalyptic number.

1981470889152 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1981470889152 is an abundant number, since it is smaller than the sum of its proper divisors (4089543252768).

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

1981470889152 is a wasteful number, since it uses less digits than its factorization.

1981470889152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3648071 (or 3648058 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 63.

The spelling of 1981470889152 in words is "one trillion, nine hundred eighty-one billion, four hundred seventy million, eight hundred eighty-nine thousand, one hundred fifty-two".