621054143335430 has 128 divisors (see below), whose sum is σ = 1368147766867200. Its totient is φ = 198134263627776.

The previous prime is 621054143335421. The next prime is 621054143335441. The reversal of 621054143335430 is 34533341450126.

It is a happy number.

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 in 63 ways as a sum of consecutive naturals, for example, 54038936 + ... + 64516004.

It is an arithmetic number, because the mean of its divisors is an integer number (10688654428650).

Almost surely, 2^{621054143335430} is an apocalyptic number.

621054143335430 is an abundant number, since it is smaller than the sum of its proper divisors (747093623531770).

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

621054143335430 is a wasteful number, since it uses less digits than its factorization.

621054143335430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10477666.

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

Adding to 621054143335430 its reverse (34533341450126), we get a palindrome (655587484785556).

The spelling of 621054143335430 in words is "six hundred twenty-one trillion, fifty-four billion, one hundred forty-three million, three hundred thirty-five thousand, four hundred thirty".