25317606421 has 8 divisors (see below), whose sum is σ = 26003857824. Its totient is φ = 24631459920.

The previous prime is 25317606397. The next prime is 25317606427. The reversal of 25317606421 is 12460671352.

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 25317606421 - 2¹⁷ = 25317475349 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25317606427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 896706 + ... + 924508.

It is an arithmetic number, because the mean of its divisors is an integer number (3250482228).

Almost surely, 2^25317606421 is an apocalyptic number.

It is an amenable number.

25317606421 is a deficient number, since it is larger than the sum of its proper divisors (686251403).

25317606421 is a wasteful number, since it uses less digits than its factorization.

25317606421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52451.

The product of its (nonzero) digits is 60480, while the sum is 37.

The spelling of 25317606421 in words is "twenty-five billion, three hundred seventeen million, six hundred six thousand, four hundred twenty-one".