25954780534 has 4 divisors (see below), whose sum is σ = 38932170804. Its totient is φ = 12977390266.

The previous prime is 25954780471. The next prime is 25954780543. The reversal of 25954780534 is 43508745952.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6488695132 + ... + 6488695135.

It is an arithmetic number, because the mean of its divisors is an integer number (9733042701).

Almost surely, 2^25954780534 is an apocalyptic number.

25954780534 is a deficient number, since it is larger than the sum of its proper divisors (12977390270).

25954780534 is a wasteful number, since it uses less digits than its factorization.

25954780534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12977390269.

The product of its (nonzero) digits is 6048000, while the sum is 52.

The spelling of 25954780534 in words is "twenty-five billion, nine hundred fifty-four million, seven hundred eighty thousand, five hundred thirty-four".