25447509011 has 4 divisors (see below), whose sum is σ = 25451178000. Its totient is φ = 25443840024.

The previous prime is 25447509007. The next prime is 25447509037. The reversal of 25447509011 is 11090574452.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25447509011 - 2² = 25447509007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25447506011) 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 3 ways as a sum of consecutive naturals, for example, 1824071 + ... + 1837968.

It is an arithmetic number, because the mean of its divisors is an integer number (6362794500).

Almost surely, 2^25447509011 is an apocalyptic number.

25447509011 is a deficient number, since it is larger than the sum of its proper divisors (3668989).

25447509011 is an equidigital number, since it uses as much as digits as its factorization.

25447509011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3668988.

The product of its (nonzero) digits is 50400, while the sum is 38.

The spelling of 25447509011 in words is "twenty-five billion, four hundred forty-seven million, five hundred nine thousand, eleven".