1891551468 has 24 divisors (see below), whose sum is σ = 4415085360. Its totient is φ = 630307840.

The previous prime is 1891551421. The next prime is 1891551499. The reversal of 1891551468 is 8641551981.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13948 + ... + 63068.

It is an arithmetic number, because the mean of its divisors is an integer number (183961890).

Almost surely, 2^1891551468 is an apocalyptic number.

It is an amenable number.

1891551468 is an abundant number, since it is smaller than the sum of its proper divisors (2523533892).

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

1891551468 is a wasteful number, since it uses less digits than its factorization.

1891551468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52337 (or 52335 counting only the distinct ones).

The product of its digits is 345600, while the sum is 48.

The square root of 1891551468 is about 43491.9701554206. The cubic root of 1891551468 is about 1236.7238065284.

The spelling of 1891551468 in words is "one billion, eight hundred ninety-one million, five hundred fifty-one thousand, four hundred sixty-eight".