25247938816 has 27 divisors (see below), whose sum is σ = 50402328123.
Its totient is φ = 12622698240.
The previous prime is 25247938811. The next prime is 25247938823. The reversal of 25247938816 is 61883974252.
The square root of 25247938816 is 158896.
It is a perfect power (a square), and thus also a powerful number.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (25247938811) by changing a digit.
It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2537371 + ... + 2547301.
Almost surely, 225247938816 is an apocalyptic number.
25247938816 is the 158896-th square number.
It is an amenable number.
25247938816 is a deficient number, since it is larger than the sum of its proper divisors (25154389307).
25247938816 is an frugal number, since it uses more digits than its factorization.
25247938816 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 19878 (or 9933 counting only the distinct ones).
The product of its digits is 5806080, while the sum is 55.
The spelling of 25247938816 in words is "twenty-five billion, two hundred forty-seven million, nine hundred thirty-eight thousand, eight hundred sixteen".