25656623349 has 64 divisors (see below), whose sum is σ = 41692299264. Its totient is φ = 13716907776.

The previous prime is 25656623339. The next prime is 25656623371. The reversal of 25656623349 is 94332665652.

It is not a de Polignac number, because 25656623349 - 2¹² = 25656619253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25656623339) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9547084 + ... + 9549770.

It is an arithmetic number, because the mean of its divisors is an integer number (651442176).

Almost surely, 2^25656623349 is an apocalyptic number.

It is an amenable number.

25656623349 is a deficient number, since it is larger than the sum of its proper divisors (16035675915).

25656623349 is a wasteful number, since it uses less digits than its factorization.

25656623349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3146.

The product of its digits is 6998400, while the sum is 51.

The spelling of 25656623349 in words is "twenty-five billion, six hundred fifty-six million, six hundred twenty-three thousand, three hundred forty-nine".