6155515220249 has 2 divisors, whose sum is σ = 6155515220250. Its totient is φ = 6155515220248.

The previous prime is 6155515220189. The next prime is 6155515220273. The reversal of 6155515220249 is 9420225155516.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3173528473600 + 2981986746649 = 1781440^2 + 1726843^2 .

It is a cyclic number.

It is not a de Polignac number, because 6155515220249 - 2³² = 6151220252953 is a prime.

It is not a weakly prime, because it can be changed into another prime (6155515220279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3077757610124 + 3077757610125.

It is an arithmetic number, because the mean of its divisors is an integer number (3077757610125).

Almost surely, 2^{6155515220249} is an apocalyptic number.

It is an amenable number.

6155515220249 is a deficient number, since it is larger than the sum of its proper divisors (1).

6155515220249 is an equidigital number, since it uses as much as digits as its factorization.

6155515220249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080000, while the sum is 47.

The spelling of 6155515220249 in words is "six trillion, one hundred fifty-five billion, five hundred fifteen million, two hundred twenty thousand, two hundred forty-nine".