1881949855279 has 8 divisors (see below), whose sum is σ = 2026900082592. Its totient is φ = 1737026035680.

The previous prime is 1881949855267. The next prime is 1881949855309. The reversal of 1881949855279 is 9725589491881.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1881949855279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1881949855579) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6453787 + ... + 6739084.

It is an arithmetic number, because the mean of its divisors is an integer number (253362510324).

Almost surely, 2^{1881949855279} is an apocalyptic number.

1881949855279 is a deficient number, since it is larger than the sum of its proper divisors (144950227313).

1881949855279 is a wasteful number, since it uses less digits than its factorization.

1881949855279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13203857.

The product of its digits is 522547200, while the sum is 76.

The spelling of 1881949855279 in words is "one trillion, eight hundred eighty-one billion, nine hundred forty-nine million, eight hundred fifty-five thousand, two hundred seventy-nine".