25405606501 has 16 divisors (see below), whose sum is σ = 28935734400. Its totient is φ = 22079977920.

The previous prime is 25405606489. The next prime is 25405606529. The reversal of 25405606501 is 10560650452.

It is not a de Polignac number, because 25405606501 - 2⁵ = 25405606469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25405606561) 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, 463075 + ... + 515023.

It is an arithmetic number, because the mean of its divisors is an integer number (1808483400).

Almost surely, 2^25405606501 is an apocalyptic number.

It is an amenable number.

25405606501 is a deficient number, since it is larger than the sum of its proper divisors (3530127899).

25405606501 is a wasteful number, since it uses less digits than its factorization.

25405606501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53916.

The product of its (nonzero) digits is 36000, while the sum is 34.

The spelling of 25405606501 in words is "twenty-five billion, four hundred five million, six hundred six thousand, five hundred one".