2421553043636 has 6 divisors (see below), whose sum is σ = 4237717826370. Its totient is φ = 1210776521816.

The previous prime is 2421553043627. The next prime is 2421553043677. The reversal of 2421553043636 is 6363403551242.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1912550702500 + 509002341136 = 1382950^2 + 713444^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302694130451 + ... + 302694130458.

It is an arithmetic number, because the mean of its divisors is an integer number (706286304395).

Almost surely, 2^{2421553043636} is an apocalyptic number.

It is an amenable number.

2421553043636 is a deficient number, since it is larger than the sum of its proper divisors (1816164782734).

2421553043636 is a wasteful number, since it uses less digits than its factorization.

2421553043636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605388260913 (or 605388260911 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 44.

Adding to 2421553043636 its reverse (6363403551242), we get a palindrome (8784956594878).

The spelling of 2421553043636 in words is "two trillion, four hundred twenty-one billion, five hundred fifty-three million, forty-three thousand, six hundred thirty-six".