25428544073 has 4 divisors (see below), whose sum is σ = 25444174800. Its totient is φ = 25412913348.

The previous prime is 25428544069. The next prime is 25428544081. The reversal of 25428544073 is 37044582452.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25428544073 - 2² = 25428544069 is a prime.

It is a super-2 number, since 2×25428544073² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25428544573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7812923 + ... + 7816176.

It is an arithmetic number, because the mean of its divisors is an integer number (6361043700).

Almost surely, 2^25428544073 is an apocalyptic number.

It is an amenable number.

25428544073 is a deficient number, since it is larger than the sum of its proper divisors (15630727).

25428544073 is a wasteful number, since it uses less digits than its factorization.

25428544073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15630726.

The product of its (nonzero) digits is 1075200, while the sum is 44.

The spelling of 25428544073 in words is "twenty-five billion, four hundred twenty-eight million, five hundred forty-four thousand, seventy-three".