25767660720 has 80 divisors (see below), whose sum is σ = 80214151680. Its totient is φ = 6842610432.

The previous prime is 25767660707. The next prime is 25767660757. The reversal of 25767660720 is 2706676752.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 25767660720.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167254 + ... + 281973.

It is an arithmetic number, because the mean of its divisors is an integer number (1002676896).

Almost surely, 2^25767660720 is an apocalyptic number.

25767660720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25767660720 is an abundant number, since it is smaller than the sum of its proper divisors (54446490960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25767660720 is a wasteful number, since it uses less digits than its factorization.

25767660720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449482 (or 449476 counting only the distinct ones).

The product of its (nonzero) digits is 1481760, while the sum is 48.

The spelling of 25767660720 in words is "twenty-five billion, seven hundred sixty-seven million, six hundred sixty thousand, seven hundred twenty".