25784345464 has 8 divisors (see below), whose sum is σ = 48345647760. Its totient is φ = 12892172728.

The previous prime is 25784345441. The next prime is 25784345467. The reversal of 25784345464 is 46454348752.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25784345467) 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 as a sum of consecutive naturals, namely, 1611521584 + ... + 1611521599.

It is an arithmetic number, because the mean of its divisors is an integer number (6043205970).

Almost surely, 2^25784345464 is an apocalyptic number.

It is an amenable number.

25784345464 is a deficient number, since it is larger than the sum of its proper divisors (22561302296).

25784345464 is a wasteful number, since it uses less digits than its factorization.

25784345464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3223043189 (or 3223043185 counting only the distinct ones).

The product of its digits is 12902400, while the sum is 52.

The spelling of 25784345464 in words is "twenty-five billion, seven hundred eighty-four million, three hundred forty-five thousand, four hundred sixty-four".