25071787442 has 64 divisors (see below), whose sum is σ = 44352645120. Its totient is φ = 10523575296.

The previous prime is 25071787441. The next prime is 25071787511. The reversal of 25071787442 is 24478717052.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is not an unprimeable number, because it can be changed into a prime (25071787441) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1633508 + ... + 1648784.

It is an arithmetic number, because the mean of its divisors is an integer number (693010080).

Almost surely, 2^25071787442 is an apocalyptic number.

25071787442 is a deficient number, since it is larger than the sum of its proper divisors (19280857678).

25071787442 is a wasteful number, since it uses less digits than its factorization.

25071787442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15435.

The product of its (nonzero) digits is 878080, while the sum is 47.

The spelling of 25071787442 in words is "twenty-five billion, seventy-one million, seven hundred eighty-seven thousand, four hundred forty-two".