25767321380 has 12 divisors (see below), whose sum is σ = 54111374940. Its totient is φ = 10306928544.

The previous prime is 25767321361. The next prime is 25767321389. The reversal of 25767321380 is 8312376752.

It can be written as a sum of positive squares in 2 ways, for example, as 19763861056 + 6003460324 = 140584^2 + 77482^2 .

It is a super-2 number, since 2×25767321380² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25767321389) 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, 644183015 + ... + 644183054.

It is an arithmetic number, because the mean of its divisors is an integer number (4509281245).

Almost surely, 2^25767321380 is an apocalyptic number.

25767321380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25767321380 is an abundant number, since it is smaller than the sum of its proper divisors (28344053560).

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

25767321380 is a wasteful number, since it uses less digits than its factorization.

25767321380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1288366078 (or 1288366076 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 44.

The spelling of 25767321380 in words is "twenty-five billion, seven hundred sixty-seven million, three hundred twenty-one thousand, three hundred eighty".