25447519461 has 64 divisors (see below), whose sum is σ = 42415331840. Its totient is φ = 13212979200.

The previous prime is 25447519439. The next prime is 25447519499. The reversal of 25447519461 is 16491574452.

It is not a de Polignac number, because 25447519461 - 2⁹ = 25447518949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25447519461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25447519561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14128761 + ... + 14130561.

It is an arithmetic number, because the mean of its divisors is an integer number (662739560).

Almost surely, 2^25447519461 is an apocalyptic number.

25447519461 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25447519461 is a deficient number, since it is larger than the sum of its proper divisors (16967812379).

25447519461 is a wasteful number, since it uses less digits than its factorization.

25447519461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2606.

The product of its digits is 1209600, while the sum is 48.

The spelling of 25447519461 in words is "twenty-five billion, four hundred forty-seven million, five hundred nineteen thousand, four hundred sixty-one".