25609170442 has 16 divisors (see below), whose sum is σ = 39173182272. Its totient is φ = 12553544160.

The previous prime is 25609170437. The next prime is 25609170473. The reversal of 25609170442 is 24407190652.

It is a super-2 number, since 2×25609170442² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25609170395 and 25609170404.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 500784 + ... + 549547.

It is an arithmetic number, because the mean of its divisors is an integer number (2448323892).

Almost surely, 2^25609170442 is an apocalyptic number.

25609170442 is a deficient number, since it is larger than the sum of its proper divisors (13564011830).

25609170442 is a wasteful number, since it uses less digits than its factorization.

25609170442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050573.

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 25609170442 in words is "twenty-five billion, six hundred nine million, one hundred seventy thousand, four hundred forty-two".