2558138820 has 48 divisors (see below), whose sum is σ = 7168488768. Its totient is φ = 681627520.

The previous prime is 2558138783. The next prime is 2558138839. The reversal of 2558138820 is 288318552.

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, 62110 + ... + 94730.

It is an arithmetic number, because the mean of its divisors is an integer number (149343516).

Almost surely, 2^2558138820 is an apocalyptic number.

2558138820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2558138820 is an abundant number, since it is smaller than the sum of its proper divisors (4610349948).

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

2558138820 is a wasteful number, since it uses less digits than its factorization.

2558138820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33940 (or 33938 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 42.

The square root of 2558138820 is about 50578.0468187533. The cubic root of 2558138820 is about 1367.6491589442.

The spelling of 2558138820 in words is "two billion, five hundred fifty-eight million, one hundred thirty-eight thousand, eight hundred twenty".