25640872627 has 8 divisors (see below), whose sum is σ = 26757895680. Its totient is φ = 24524033160.

The previous prime is 25640872589. The next prime is 25640872637. The reversal of 25640872627 is 72627804652.

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 25640872627 - 2¹⁹ = 25640348339 is a prime.

It is a super-2 number, since 2×25640872627² (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 (25640872637) 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, 292774 + ... + 370132.

It is an arithmetic number, because the mean of its divisors is an integer number (3344736960).

Almost surely, 2^25640872627 is an apocalyptic number.

25640872627 is a deficient number, since it is larger than the sum of its proper divisors (1117023053).

25640872627 is a wasteful number, since it uses less digits than its factorization.

25640872627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91793.

The product of its (nonzero) digits is 2257920, while the sum is 49.

The spelling of 25640872627 in words is "twenty-five billion, six hundred forty million, eight hundred seventy-two thousand, six hundred twenty-seven".