621677523793 has 2 divisors, whose sum is σ = 621677523794. Its totient is φ = 621677523792.

The previous prime is 621677523781. The next prime is 621677523823. The reversal of 621677523793 is 397325776126.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 352707707664 + 268969816129 = 593892^2 + 518623^2 .

It is a cyclic number.

It is not a de Polignac number, because 621677523793 - 2²¹ = 621675426641 is a prime.

It is a super-2 number, since 2×621677523793² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (621677523703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310838761896 + 310838761897.

It is an arithmetic number, because the mean of its divisors is an integer number (310838761897).

Almost surely, 2^621677523793 is an apocalyptic number.

It is an amenable number.

621677523793 is a deficient number, since it is larger than the sum of its proper divisors (1).

621677523793 is an equidigital number, since it uses as much as digits as its factorization.

621677523793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20003760, while the sum is 58.

The spelling of 621677523793 in words is "six hundred twenty-one billion, six hundred seventy-seven million, five hundred twenty-three thousand, seven hundred ninety-three".