25428605139 has 24 divisors (see below), whose sum is σ = 41984104032. Its totient is φ = 14528304000.

The previous prime is 25428605129. The next prime is 25428605143. The reversal of 25428605139 is 93150682452.

25428605139 is a `hidden beast` number, since 2 + 5 + 4 + 2 + 8 + 605 + 1 + 39 = 666.

It is not a de Polignac number, because 25428605139 - 2⁴ = 25428605123 is a prime.

It is a super-2 number, since 2×25428605139² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25428605094 and 25428605103.

It is not an unprimeable number, because it can be changed into a prime (25428605129) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 412237 + ... + 469889.

It is an arithmetic number, because the mean of its divisors is an integer number (1749337668).

Almost surely, 2^25428605139 is an apocalyptic number.

25428605139 is a deficient number, since it is larger than the sum of its proper divisors (16555498893).

25428605139 is a wasteful number, since it uses less digits than its factorization.

25428605139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64667 (or 64664 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 25428605139 in words is "twenty-five billion, four hundred twenty-eight million, six hundred five thousand, one hundred thirty-nine".