2631222241638 has 16 divisors (see below), whose sum is σ = 5283410400576. Its totient is φ = 873579761000.

The previous prime is 2631222241607. The next prime is 2631222241639. The reversal of 2631222241638 is 8361422221362.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2631222241638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2631222241639) 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, 873578256 + ... + 873581267.

It is an arithmetic number, because the mean of its divisors is an integer number (330213150036).

Almost surely, 2^{2631222241638} is an apocalyptic number.

2631222241638 is an abundant number, since it is smaller than the sum of its proper divisors (2652188158938).

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

2631222241638 is a wasteful number, since it uses less digits than its factorization.

2631222241638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1747159779.

The product of its digits is 331776, while the sum is 42.

The spelling of 2631222241638 in words is "two trillion, six hundred thirty-one billion, two hundred twenty-two million, two hundred forty-one thousand, six hundred thirty-eight".