25351043517897 has 16 divisors (see below), whose sum is σ = 34594863114240. Its totient is φ = 16504127820432.

The previous prime is 25351043517859. The next prime is 25351043517931. The reversal of 25351043517897 is 79871534015352.

It is not a de Polignac number, because 25351043517897 - 2⁸ = 25351043517641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25351043517897.

It is not an unprimeable number, because it can be changed into a prime (25351043517857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20396593 + ... + 21603774.

It is an arithmetic number, because the mean of its divisors is an integer number (2162178944640).

Almost surely, 2^{25351043517897} is an apocalyptic number.

It is an amenable number.

25351043517897 is a deficient number, since it is larger than the sum of its proper divisors (9243819596343).

25351043517897 is a wasteful number, since it uses less digits than its factorization.

25351043517897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42005092.

The product of its (nonzero) digits is 31752000, while the sum is 60.

The spelling of 25351043517897 in words is "twenty-five trillion, three hundred fifty-one billion, forty-three million, five hundred seventeen thousand, eight hundred ninety-seven".