1891797014464 has 168 divisors, whose sum is σ = 4524627496320. Its totient is φ = 781688678400.

The previous prime is 1891797014453. The next prime is 1891797014509. The reversal of 1891797014464 is 4644107971981.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26114934 + ... + 26187274.

Almost surely, 2^{1891797014464} is an apocalyptic number.

1891797014464 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1891797014464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2262313748160).

1891797014464 is an abundant number, since it is smaller than the sum of its proper divisors (2632830481856).

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

1891797014464 is a wasteful number, since it uses less digits than its factorization.

1891797014464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72667 (or 72650 counting only the distinct ones).

The product of its (nonzero) digits is 12192768, while the sum is 61.

The spelling of 1891797014464 in words is "one trillion, eight hundred ninety-one billion, seven hundred ninety-seven million, fourteen thousand, four hundred sixty-four".