25401256016 has 10 divisors (see below), whose sum is σ = 49214933562. Its totient is φ = 12700628000.

The previous prime is 25401255983. The next prime is 25401256037. The reversal of 25401256016 is 61065210452.

It can be written as a sum of positive squares in only one way, i.e., 19270992400 + 6130263616 = 138820^2 + 78296^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 793789235 + ... + 793789266.

Almost surely, 2^25401256016 is an apocalyptic number.

It is an amenable number.

25401256016 is a deficient number, since it is larger than the sum of its proper divisors (23813677546).

25401256016 is a wasteful number, since it uses less digits than its factorization.

25401256016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1587578509 (or 1587578503 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 25401256016 its reverse (61065210452), we get a palindrome (86466466468).

The spelling of 25401256016 in words is "twenty-five billion, four hundred one million, two hundred fifty-six thousand, sixteen".