30257558809 has 9 divisors (see below), whose sum is σ = 30923389471. Its totient is φ = 29605779400.

The previous prime is 30257558803. The next prime is 30257558887. The reversal of 30257558809 is 90885575203.

The square root of 30257558809 is 173947.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 12188822409 + 18068736400 = 110403^2 + 134420^2 .

It is not a de Polignac number, because 30257558809 - 2¹⁷ = 30257427737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30257558803) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 8173659 + ... + 8177359.

Almost surely, 2^30257558809 is an apocalyptic number.

30257558809 is the 173947-th square number.

30257558809 is the 86974-th centered octagonal number.

It is an amenable number.

30257558809 is a deficient number, since it is larger than the sum of its proper divisors (665830662).

30257558809 is an frugal number, since it uses more digits than its factorization.

30257558809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7496 (or 3748 counting only the distinct ones).

The product of its (nonzero) digits is 3024000, while the sum is 52.

It can be divided in two parts, 3025755 and 8809, that added together give a square (3034564 = 1742²).

The spelling of 30257558809 in words is "thirty billion, two hundred fifty-seven million, five hundred fifty-eight thousand, eight hundred nine".