25616433412 has 12 divisors (see below), whose sum is σ = 44865602460. Its totient is φ = 12797689856.

The previous prime is 25616433407. The next prime is 25616433421. The reversal of 25616433412 is 21433461652.

It can be written as a sum of positive squares in 2 ways, for example, as 4103171136 + 21513262276 = 64056^2 + 146674^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2626237 + ... + 2635972.

It is an arithmetic number, because the mean of its divisors is an integer number (3738800205).

Almost surely, 2^25616433412 is an apocalyptic number.

It is an amenable number.

25616433412 is a deficient number, since it is larger than the sum of its proper divisors (19249169048).

25616433412 is a wasteful number, since it uses less digits than its factorization.

25616433412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5263430 (or 5263428 counting only the distinct ones).

The product of its digits is 103680, while the sum is 37.

The spelling of 25616433412 in words is "twenty-five billion, six hundred sixteen million, four hundred thirty-three thousand, four hundred twelve".