25327780001 has 4 divisors (see below), whose sum is σ = 25345382400. Its totient is φ = 25310177604.

The previous prime is 25327779959. The next prime is 25327780003. The reversal of 25327780001 is 10008772352.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25327780001 - 2¹⁸ = 25327517857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25327780003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8799041 + ... + 8801918.

It is an arithmetic number, because the mean of its divisors is an integer number (6336345600).

Almost surely, 2^25327780001 is an apocalyptic number.

It is an amenable number.

25327780001 is a deficient number, since it is larger than the sum of its proper divisors (17602399).

25327780001 is a wasteful number, since it uses less digits than its factorization.

25327780001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17602398.

The product of its (nonzero) digits is 23520, while the sum is 35.

The spelling of 25327780001 in words is "twenty-five billion, three hundred twenty-seven million, seven hundred eighty thousand, one".