2549428639720 has 64 divisors (see below), whose sum is σ = 5796329369040. Its totient is φ = 1009095936000.

The previous prime is 2549428639711. The next prime is 2549428639739. The reversal of 2549428639720 is 279368249452.

It can be written as a sum of positive squares in 8 ways, for example, as 1587463922916 + 961964716804 = 1259946^2 + 980798^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6902130 + ... + 7262110.

Almost surely, 2^{2549428639720} is an apocalyptic number.

2549428639720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2549428639720 is an abundant number, since it is smaller than the sum of its proper divisors (3246900729320).

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

2549428639720 is a wasteful number, since it uses less digits than its factorization.

2549428639720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361846 (or 361842 counting only the distinct ones).

The product of its (nonzero) digits is 52254720, while the sum is 61.

The spelling of 2549428639720 in words is "two trillion, five hundred forty-nine billion, four hundred twenty-eight million, six hundred thirty-nine thousand, seven hundred twenty".