25387946530 has 16 divisors (see below), whose sum is σ = 45735875640. Its totient is φ = 10146829312.

The previous prime is 25387946513. The next prime is 25387946533. The reversal of 25387946530 is 3564978352.

It can be written as a sum of positive squares in 4 ways, for example, as 23231551561 + 2156394969 = 152419^2 + 46437^2 .

It is not an unprimeable number, because it can be changed into a prime (25387946533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1030885 + ... + 1055224.

Almost surely, 2^25387946530 is an apocalyptic number.

25387946530 is a deficient number, since it is larger than the sum of its proper divisors (20347929110).

25387946530 is a wasteful number, since it uses less digits than its factorization.

25387946530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2087333.

The product of its (nonzero) digits is 5443200, while the sum is 52.

The spelling of 25387946530 in words is "twenty-five billion, three hundred eighty-seven million, nine hundred forty-six thousand, five hundred thirty".