2817578461872 has 20 divisors (see below), whose sum is σ = 7278744359960. Its totient is φ = 939192820608.

The previous prime is 2817578461871. The next prime is 2817578461877. The reversal of 2817578461872 is 2781648757182.

It is not an unprimeable number, because it can be changed into a prime (2817578461871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29349775597 + ... + 29349775692.

It is an arithmetic number, because the mean of its divisors is an integer number (363937217998).

Almost surely, 2^{2817578461872} is an apocalyptic number.

It is an amenable number.

2817578461872 is an abundant number, since it is smaller than the sum of its proper divisors (4461165898088).

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

2817578461872 is a wasteful number, since it uses less digits than its factorization.

2817578461872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58699551300 (or 58699551294 counting only the distinct ones).

The product of its digits is 84295680, while the sum is 66.

The spelling of 2817578461872 in words is "two trillion, eight hundred seventeen billion, five hundred seventy-eight million, four hundred sixty-one thousand, eight hundred seventy-two".