421144111644 has 96 divisors (see below), whose sum is σ = 1038363346944. Its totient is φ = 132641832960.

The previous prime is 421144111637. The next prime is 421144111651. The reversal of 421144111644 is 446111441124.

It is an interprime number because it is at equal distance from previous prime (421144111637) and next prime (421144111651).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79865392 + ... + 79870664.

It is an arithmetic number, because the mean of its divisors is an integer number (10816284864).

Almost surely, 2^421144111644 is an apocalyptic number.

It is an amenable number.

421144111644 is an abundant number, since it is smaller than the sum of its proper divisors (617219235300).

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

421144111644 is a wasteful number, since it uses less digits than its factorization.

421144111644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10347 (or 10345 counting only the distinct ones).

The product of its digits is 12288, while the sum is 33.

Adding to 421144111644 its reverse (446111441124), we get a palindrome (867255552768).

The spelling of 421144111644 in words is "four hundred twenty-one billion, one hundred forty-four million, one hundred eleven thousand, six hundred forty-four".