25020690817 has 8 divisors (see below), whose sum is σ = 25064911872. Its totient is φ = 24976509600.

The previous prime is 25020690743. The next prime is 25020690853. The reversal of 25020690817 is 71809602052.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25020690817 - 2¹⁵ = 25020658049 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25020690817.

It is not an unprimeable number, because it can be changed into a prime (25020690917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1423392 + ... + 1440862.

It is an arithmetic number, because the mean of its divisors is an integer number (3133113984).

Almost surely, 2^25020690817 is an apocalyptic number.

It is an amenable number.

25020690817 is a deficient number, since it is larger than the sum of its proper divisors (44221055).

25020690817 is a wasteful number, since it uses less digits than its factorization.

25020690817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19919.

The product of its (nonzero) digits is 60480, while the sum is 40.

The spelling of 25020690817 in words is "twenty-five billion, twenty million, six hundred ninety thousand, eight hundred seventeen".