25391405645016 has 32 divisors (see below), whose sum is σ = 63478990172400. Its totient is φ = 8463738407040.

The previous prime is 25391405645003. The next prime is 25391405645033. The reversal of 25391405645016 is 61054650419352.

It is a self number, because there is not a number n which added to its sum of digits gives 25391405645016.

It is a congruent number.

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, 643471 + ... + 7155198.

Almost surely, 2^{25391405645016} is an apocalyptic number.

It is an amenable number.

25391405645016 is an abundant number, since it is smaller than the sum of its proper divisors (38087584527384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25391405645016 is a wasteful number, since it uses less digits than its factorization.

25391405645016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7934339 (or 7934335 counting only the distinct ones).

The product of its (nonzero) digits is 3888000, while the sum is 51.

The spelling of 25391405645016 in words is "twenty-five trillion, three hundred ninety-one billion, four hundred five million, six hundred forty-five thousand, sixteen".