63373204017421 has 2 divisors, whose sum is σ = 63373204017422. Its totient is φ = 63373204017420.

The previous prime is 63373204017377. The next prime is 63373204017509. The reversal of 63373204017421 is 12471040237336.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32187524294025 + 31185679723396 = 5673405^2 + 5584414^2 .

It is a cyclic number.

It is not a de Polignac number, because 63373204017421 - 2⁹ = 63373204016909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63373204057421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31686602008710 + 31686602008711.

It is an arithmetic number, because the mean of its divisors is an integer number (31686602008711).

Almost surely, 2^{63373204017421} is an apocalyptic number.

It is an amenable number.

63373204017421 is a deficient number, since it is larger than the sum of its proper divisors (1).

63373204017421 is an equidigital number, since it uses as much as digits as its factorization.

63373204017421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 508032, while the sum is 43.

The spelling of 63373204017421 in words is "sixty-three trillion, three hundred seventy-three billion, two hundred four million, seventeen thousand, four hundred twenty-one".