40063644621 has 144 divisors (see below), whose sum is σ = 78538981248. Its totient is φ = 19149799680.

The previous prime is 40063644613. The next prime is 40063644631. The reversal of 40063644621 is 12644636004.

40063644621 is a `hidden beast` number, since 4 + 0 + 0 + 6 + 3 + 644 + 6 + 2 + 1 = 666.

It is not a de Polignac number, because 40063644621 - 2³ = 40063644613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40063644611) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 51828391 + ... + 51829163.

It is an arithmetic number, because the mean of its divisors is an integer number (545409592).

Almost surely, 2^40063644621 is an apocalyptic number.

It is an amenable number.

40063644621 is a deficient number, since it is larger than the sum of its proper divisors (38475336627).

40063644621 is a wasteful number, since it uses less digits than its factorization.

40063644621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344 (or 1330 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The spelling of 40063644621 in words is "forty billion, sixty-three million, six hundred forty-four thousand, six hundred twenty-one".