25520542354 has 32 divisors (see below), whose sum is σ = 40129862400. Its totient is φ = 12149197632.

The previous prime is 25520542349. The next prime is 25520542357. The reversal of 25520542354 is 45324502552.

It is a super-2 number, since 2×25520542354² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25520542357) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10937772 + ... + 10940104.

It is an arithmetic number, because the mean of its divisors is an integer number (1254058200).

Almost surely, 2^25520542354 is an apocalyptic number.

25520542354 is a deficient number, since it is larger than the sum of its proper divisors (14609320046).

25520542354 is a wasteful number, since it uses less digits than its factorization.

25520542354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3354.

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

The spelling of 25520542354 in words is "twenty-five billion, five hundred twenty million, five hundred forty-two thousand, three hundred fifty-four".