25919963912 has 8 divisors (see below), whose sum is σ = 48599932350. Its totient is φ = 12959981952.

The previous prime is 25919963857. The next prime is 25919963917. The reversal of 25919963912 is 21936991952.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 21599005156 + 4320958756 = 146966^2 + 65734^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (25919963917) by changing a digit.

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, 1619997737 + ... + 1619997752.

Almost surely, 2^25919963912 is an apocalyptic number.

It is an amenable number.

25919963912 is a deficient number, since it is larger than the sum of its proper divisors (22679968438).

25919963912 is a wasteful number, since it uses less digits than its factorization.

25919963912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3239995495 (or 3239995491 counting only the distinct ones).

The product of its digits is 2361960, while the sum is 56.

The spelling of 25919963912 in words is "twenty-five billion, nine hundred nineteen million, nine hundred sixty-three thousand, nine hundred twelve".