621546651346 has 16 divisors (see below), whose sum is σ = 935035799040. Its totient is φ = 309869121280.

The previous prime is 621546651329. The next prime is 621546651347. The reversal of 621546651346 is 643156645126.

It is a super-2 number, since 2×621546651346² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 621546651346.

It is not an unprimeable number, because it can be changed into a prime (621546651347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 899331 + ... + 1432441.

It is an arithmetic number, because the mean of its divisors is an integer number (58439737440).

Almost surely, 2^621546651346 is an apocalyptic number.

621546651346 is a deficient number, since it is larger than the sum of its proper divisors (313489147694).

621546651346 is a wasteful number, since it uses less digits than its factorization.

621546651346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534809.

The product of its digits is 3110400, while the sum is 49.

The spelling of 621546651346 in words is "six hundred twenty-one billion, five hundred forty-six million, six hundred fifty-one thousand, three hundred forty-six".