25061636 has 12 divisors (see below), whose sum is σ = 43906380. Its totient is φ = 12516960.

The previous prime is 25061593. The next prime is 25061639. The reversal of 25061636 is 63616052.

It can be written as a sum of positive squares in 2 ways, for example, as 11519236 + 13542400 = 3394^2 + 3680^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25061599 and 25061608.

It is not an unprimeable number, because it can be changed into a prime (25061639) 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, 1346 + ... + 7206.

It is an arithmetic number, because the mean of its divisors is an integer number (3658865).

Almost surely, 2^25061636 is an apocalyptic number.

It is an amenable number.

25061636 is a deficient number, since it is larger than the sum of its proper divisors (18844744).

25061636 is a wasteful number, since it uses less digits than its factorization.

25061636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6934 (or 6932 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 25061636 is about 5006.1598056794. The cubic root of 25061636 is about 292.6418762863.

Adding to 25061636 its reverse (63616052), we get a palindrome (88677688).

It can be divided in two parts, 2506 and 1636, that multiplied together give a triangular number (4099816 = T₂₈₆₃).

The spelling of 25061636 in words is "twenty-five million, sixty-one thousand, six hundred thirty-six".