6503238133961 has 2 divisors, whose sum is σ = 6503238133962. Its totient is φ = 6503238133960.

The previous prime is 6503238133937. The next prime is 6503238133967. The reversal of 6503238133961 is 1693318323056.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4179653136400 + 2323584997561 = 2044420^2 + 1524331^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6503238133961 is a prime.

It is not a weakly prime, because it can be changed into another prime (6503238133967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3251619066980 + 3251619066981.

It is an arithmetic number, because the mean of its divisors is an integer number (3251619066981).

Almost surely, 2^{6503238133961} is an apocalyptic number.

It is an amenable number.

6503238133961 is a deficient number, since it is larger than the sum of its proper divisors (1).

6503238133961 is an equidigital number, since it uses as much as digits as its factorization.

6503238133961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2099520, while the sum is 50.

The spelling of 6503238133961 in words is "six trillion, five hundred three billion, two hundred thirty-eight million, one hundred thirty-three thousand, nine hundred sixty-one".