40063261636665 has 48 divisors (see below), whose sum is σ = 72222607142400. Its totient is φ = 20526425053056.

The previous prime is 40063261636663. The next prime is 40063261636691. The reversal of 40063261636665 is 56663616236004.

It is a happy number.

It is not a de Polignac number, because 40063261636665 - 2¹ = 40063261636663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40063261636663) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 152159725 + ... + 152422794.

It is an arithmetic number, because the mean of its divisors is an integer number (1504637648800).

Almost surely, 2^{40063261636665} is an apocalyptic number.

40063261636665 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40063261636665 is a deficient number, since it is larger than the sum of its proper divisors (32159345505735).

40063261636665 is a wasteful number, since it uses less digits than its factorization.

40063261636665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304582646 (or 304582643 counting only the distinct ones).

The product of its (nonzero) digits is 16796160, while the sum is 54.

The spelling of 40063261636665 in words is "forty trillion, sixty-three billion, two hundred sixty-one million, six hundred thirty-six thousand, six hundred sixty-five".