25444350505 has 16 divisors (see below), whose sum is σ = 35553510144. Its totient is φ = 17118354240.

The previous prime is 25444350467. The next prime is 25444350577. The reversal of 25444350505 is 50505344452.

It is not a de Polignac number, because 25444350505 - 2⁷ = 25444350377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6856461 + ... + 6860170.

It is an arithmetic number, because the mean of its divisors is an integer number (2222094384).

Almost surely, 2^25444350505 is an apocalyptic number.

It is an amenable number.

25444350505 is a deficient number, since it is larger than the sum of its proper divisors (10109159639).

25444350505 is a wasteful number, since it uses less digits than its factorization.

25444350505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13716696.

The product of its (nonzero) digits is 240000, while the sum is 37.

Adding to 25444350505 its reverse (50505344452), we get a palindrome (75949694957).

The spelling of 25444350505 in words is "twenty-five billion, four hundred forty-four million, three hundred fifty thousand, five hundred five".