25428043623 has 8 divisors (see below), whose sum is σ = 33908371200. Its totient is φ = 16949872568.

The previous prime is 25428043609. The next prime is 25428043631. The reversal of 25428043623 is 32634082452.

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 25428043623 - 2⁵ = 25428043591 is a prime.

It is a super-2 number, since 2×25428043623² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25428043633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 511413 + ... + 558926.

It is an arithmetic number, because the mean of its divisors is an integer number (4238546400).

Almost surely, 2^25428043623 is an apocalyptic number.

25428043623 is a deficient number, since it is larger than the sum of its proper divisors (8480327577).

25428043623 is a wasteful number, since it uses less digits than its factorization.

25428043623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078261.

The product of its (nonzero) digits is 276480, while the sum is 39.

The spelling of 25428043623 in words is "twenty-five billion, four hundred twenty-eight million, forty-three thousand, six hundred twenty-three".