5615661115997 has 2 divisors, whose sum is σ = 5615661115998. Its totient is φ = 5615661115996.

The previous prime is 5615661115993. The next prime is 5615661116041. The reversal of 5615661115997 is 7995111665165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5358942573721 + 256718542276 = 2314939^2 + 506674^2 .

It is a cyclic number.

It is not a de Polignac number, because 5615661115997 - 2² = 5615661115993 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5615661115993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2807830557998 + 2807830557999.

It is an arithmetic number, because the mean of its divisors is an integer number (2807830557999).

Almost surely, 2^{5615661115997} is an apocalyptic number.

It is an amenable number.

5615661115997 is a deficient number, since it is larger than the sum of its proper divisors (1).

5615661115997 is an equidigital number, since it uses as much as digits as its factorization.

5615661115997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15309000, while the sum is 62.

The spelling of 5615661115997 in words is "five trillion, six hundred fifteen billion, six hundred sixty-one million, one hundred fifteen thousand, nine hundred ninety-seven".