621662746340 has 96 divisors (see below), whose sum is σ = 1338176318976. Its totient is φ = 242499479040.

The previous prime is 621662746319. The next prime is 621662746361. The reversal of 621662746340 is 43647266126.

It is an interprime number because it is at equal distance from previous prime (621662746319) and next prime (621662746361).

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 31 ways as a sum of consecutive naturals, for example, 244459109 + ... + 244461651.

It is an arithmetic number, because the mean of its divisors is an integer number (13939336656).

Almost surely, 2^621662746340 is an apocalyptic number.

It is an amenable number.

621662746340 is an abundant number, since it is smaller than the sum of its proper divisors (716513572636).

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

621662746340 is a wasteful number, since it uses less digits than its factorization.

621662746340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3909 (or 3907 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 47.

The spelling of 621662746340 in words is "six hundred twenty-one billion, six hundred sixty-two million, seven hundred forty-six thousand, three hundred forty".