25400208545 has 16 divisors (see below), whose sum is σ = 30589270272. Its totient is φ = 20247575040.

The previous prime is 25400208527. The next prime is 25400208553. The reversal of 25400208545 is 54580200452.

It is not a de Polignac number, because 25400208545 - 2¹⁶ = 25400143009 is a prime.

It is a Duffinian 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 15 ways as a sum of consecutive naturals, for example, 2789450 + ... + 2798540.

It is an arithmetic number, because the mean of its divisors is an integer number (1911829392).

Almost surely, 2^25400208545 is an apocalyptic number.

It is an amenable number.

25400208545 is a deficient number, since it is larger than the sum of its proper divisors (5189061727).

25400208545 is a wasteful number, since it uses less digits than its factorization.

25400208545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11032.

The product of its (nonzero) digits is 64000, while the sum is 35.

Adding to 25400208545 its reverse (54580200452), we get a palindrome (79980408997).

The spelling of 25400208545 in words is "twenty-five billion, four hundred million, two hundred eight thousand, five hundred forty-five".