440061636043631 has 4 divisors (see below), whose sum is σ = 502927584049872. Its totient is φ = 377195688037392.

The previous prime is 440061636043609. The next prime is 440061636043681. The reversal of 440061636043631 is 136340636160044.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-440061636043631 is a prime.

It is a super-2 number, since 2×440061636043631² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440061636043681) 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, 31432974003110 + ... + 31432974003123.

It is an arithmetic number, because the mean of its divisors is an integer number (125731896012468).

Almost surely, 2^{440061636043631} is an apocalyptic number.

440061636043631 is a deficient number, since it is larger than the sum of its proper divisors (62865948006241).

440061636043631 is an equidigital number, since it uses as much as digits as its factorization.

440061636043631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62865948006240.

The product of its (nonzero) digits is 2239488, while the sum is 47.

The spelling of 440061636043631 in words is "four hundred forty trillion, sixty-one billion, six hundred thirty-six million, forty-three thousand, six hundred thirty-one".