25545359434 has 24 divisors (see below), whose sum is σ = 47196051300. Its totient is φ = 10304009856.

The previous prime is 25545359431. The next prime is 25545359447. The reversal of 25545359434 is 43495354552.

It can be written as a sum of positive squares in 2 ways, for example, as 24971900625 + 573458809 = 158025^2 + 23947^2 .

It is a super-2 number, since 2×25545359434² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (25545359431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7665009 + ... + 7668340.

Almost surely, 2^25545359434 is an apocalyptic number.

25545359434 is a deficient number, since it is larger than the sum of its proper divisors (21650691866).

25545359434 is a wasteful number, since it uses less digits than its factorization.

25545359434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15333382 (or 15333375 counting only the distinct ones).

The product of its digits is 6480000, while the sum is 49.

The spelling of 25545359434 in words is "twenty-five billion, five hundred forty-five million, three hundred fifty-nine thousand, four hundred thirty-four".