4012636544 has 64 divisors (see below), whose sum is σ = 9358826400. Its totient is φ = 1677742080.

The previous prime is 4012636541. The next prime is 4012636549. The reversal of 4012636544 is 4456362104.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×4012636544² = 32202504068488527872, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4012636541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17879 + ... + 91350.

Almost surely, 2^4012636544 is an apocalyptic number.

It is an amenable number.

4012636544 is an abundant number, since it is smaller than the sum of its proper divisors (5346189856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4012636544 is a wasteful number, since it uses less digits than its factorization.

4012636544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109291 (or 109279 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 35.

The square root of 4012636544 is about 63345.3750797957. The cubic root of 4012636544 is about 1589.0709000449.

Adding to 4012636544 its reverse (4456362104), we get a palindrome (8468998648).

The spelling of 4012636544 in words is "four billion, twelve million, six hundred thirty-six thousand, five hundred forty-four".