621348900481 has 4 divisors (see below), whose sum is σ = 621350478000. Its totient is φ = 621347322964.

The previous prime is 621348900467. The next prime is 621348900503. The reversal of 621348900481 is 184009843126.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 621348900481 - 2⁵ = 621348900449 is a prime.

It is a super-2 number, since 2×621348900481² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621348900451) 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, 352170 + ... + 1169068.

It is an arithmetic number, because the mean of its divisors is an integer number (155337619500).

Almost surely, 2^621348900481 is an apocalyptic number.

It is an amenable number.

621348900481 is a deficient number, since it is larger than the sum of its proper divisors (1577519).

621348900481 is an equidigital number, since it uses as much as digits as its factorization.

621348900481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1577518.

The product of its (nonzero) digits is 331776, while the sum is 46.

The spelling of 621348900481 in words is "six hundred twenty-one billion, three hundred forty-eight million, nine hundred thousand, four hundred eighty-one".