7881401855 has 8 divisors (see below), whose sum is σ = 9458158752. Its totient is φ = 6304803808.

The previous prime is 7881401819. The next prime is 7881401893. The reversal of 7881401855 is 5581041887.

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

It is a cyclic number.

It is not a de Polignac number, because 7881401855 - 2¹⁶ = 7881336319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174422 + ... + 214908.

It is an arithmetic number, because the mean of its divisors is an integer number (1182269844).

Almost surely, 2^7881401855 is an apocalyptic number.

7881401855 is a deficient number, since it is larger than the sum of its proper divisors (1576756897).

7881401855 is a wasteful number, since it uses less digits than its factorization.

7881401855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79425.

The product of its (nonzero) digits is 358400, while the sum is 47.

The square root of 7881401855 is about 88777.2597853752. The cubic root of 7881401855 is about 1990.0675763859.

The spelling of 7881401855 in words is "seven billion, eight hundred eighty-one million, four hundred one thousand, eight hundred fifty-five".