1887910891452 has 36 divisors (see below), whose sum is σ = 4773259088416. Its totient is φ = 629166502080.

The previous prime is 1887910891439. The next prime is 1887910891453. The reversal of 1887910891452 is 2541980197881.

1887910891452 is a `hidden beast` number, since 1 + 8 + 8 + 7 + 91 + 0 + 8 + 91 + 452 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1887910891452.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1887910891453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5546113 + ... + 5876664.

Almost surely, 2^{1887910891452} is an apocalyptic number.

1887910891452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1887910891452 is an abundant number, since it is smaller than the sum of its proper divisors (2885348196964).

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

1887910891452 is a wasteful number, since it uses less digits than its factorization.

1887910891452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11427378 (or 11427373 counting only the distinct ones).

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

The spelling of 1887910891452 in words is "one trillion, eight hundred eighty-seven billion, nine hundred ten million, eight hundred ninety-one thousand, four hundred fifty-two".