2856639972480 has 512 divisors, whose sum is σ = 11027985408000. Its totient is φ = 614006980608.

The previous prime is 2856639972467. The next prime is 2856639972499. The reversal of 2856639972480 is 842799366582.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 301360381 + ... + 301369859.

It is an arithmetic number, because the mean of its divisors is an integer number (21539034000).

Almost surely, 2^{2856639972480} is an apocalyptic number.

2856639972480 is a gapful number since it is divisible by the number (20) 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 2856639972480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5513992704000).

2856639972480 is an abundant number, since it is smaller than the sum of its proper divisors (8171345435520).

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

2856639972480 is a wasteful number, since it uses less digits than its factorization.

2856639972480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10844 (or 10832 counting only the distinct ones).

The product of its (nonzero) digits is 313528320, while the sum is 69.

The spelling of 2856639972480 in words is "two trillion, eight hundred fifty-six billion, six hundred thirty-nine million, nine hundred seventy-two thousand, four hundred eighty".