3891677551872 has 144 divisors (see below), whose sum is σ = 11339065210368. Its totient is φ = 1175128381440.

The previous prime is 3891677551781. The next prime is 3891677551873. The reversal of 3891677551872 is 2781557761983.

It is a junction number, because it is equal to n+sod(n) for n = 3891677551797 and 3891677551806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3891677551873) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1576893 + ... + 3204675.

Almost surely, 2^{3891677551872} is an apocalyptic number.

3891677551872 is a gapful number since it is divisible by the number (32) 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 3891677551872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5669532605184).

3891677551872 is an abundant number, since it is smaller than the sum of its proper divisors (7447387658496).

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

3891677551872 is a wasteful number, since it uses less digits than its factorization.

3891677551872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1628096 (or 1628082 counting only the distinct ones).

The product of its digits is 177811200, while the sum is 69.

The spelling of 3891677551872 in words is "three trillion, eight hundred ninety-one billion, six hundred seventy-seven million, five hundred fifty-one thousand, eight hundred seventy-two".