25045321405 has 32 divisors (see below), whose sum is σ = 33361219584. Its totient is φ = 17932755456.

The previous prime is 25045321397. The next prime is 25045321421. The reversal of 25045321405 is 50412354052.

It is a cyclic number.

It is not a de Polignac number, because 25045321405 - 2³ = 25045321397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 350212 + ... + 415618.

It is an arithmetic number, because the mean of its divisors is an integer number (1042538112).

Almost surely, 2^25045321405 is an apocalyptic number.

It is an amenable number.

25045321405 is a deficient number, since it is larger than the sum of its proper divisors (8315898179).

25045321405 is a wasteful number, since it uses less digits than its factorization.

25045321405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65605.

The product of its (nonzero) digits is 24000, while the sum is 31.

Adding to 25045321405 its reverse (50412354052), we get a palindrome (75457675457).

The spelling of 25045321405 in words is "twenty-five billion, forty-five million, three hundred twenty-one thousand, four hundred five".