25643605051 has 8 divisors (see below), whose sum is σ = 25976530944. Its totient is φ = 25311249960.

The previous prime is 25643604983. The next prime is 25643605121. The reversal of 25643605051 is 15050634652.

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 25643605051 - 2¹⁷ = 25643473979 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25643605051.

It is not an unprimeable number, because it can be changed into a prime (25643608051) 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, 51895 + ... + 232336.

It is an arithmetic number, because the mean of its divisors is an integer number (3247066368).

Almost surely, 2^25643605051 is an apocalyptic number.

25643605051 is a deficient number, since it is larger than the sum of its proper divisors (332925893).

25643605051 is a wasteful number, since it uses less digits than its factorization.

25643605051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285401.

The product of its (nonzero) digits is 108000, while the sum is 37.

The spelling of 25643605051 in words is "twenty-five billion, six hundred forty-three million, six hundred five thousand, fifty-one".