25712778016 has 24 divisors (see below), whose sum is σ = 50638826700. Its totient is φ = 12852123648.

The previous prime is 25712777999. The next prime is 25712778019. The reversal of 25712778016 is 61087721752.

It can be written as a sum of positive squares in 2 ways, for example, as 22016624400 + 3696153616 = 148380^2 + 60796^2 .

It is a super-2 number, since 2×25712778016² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25712778019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34201 + ... + 229336.

Almost surely, 2^25712778016 is an apocalyptic number.

It is an amenable number.

25712778016 is a deficient number, since it is larger than the sum of its proper divisors (24926048684).

25712778016 is a wasteful number, since it uses less digits than its factorization.

25712778016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266596 (or 266588 counting only the distinct ones).

The product of its (nonzero) digits is 329280, while the sum is 46.

The spelling of 25712778016 in words is "twenty-five billion, seven hundred twelve million, seven hundred seventy-eight thousand, sixteen".