61104156013 has 2 divisors, whose sum is σ = 61104156014. Its totient is φ = 61104156012.

The previous prime is 61104156011. The next prime is 61104156037. The reversal of 61104156013 is 31065140116.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49931243209 + 11172912804 = 223453^2 + 105702^2 .

It is a cyclic number.

It is not a de Polignac number, because 61104156013 - 2¹ = 61104156011 is a prime.

It is a super-2 number, since 2×61104156013² (a number of 22 digits) contains 22 as substring.

Together with 61104156011, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61104156011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30552078006 + 30552078007.

It is an arithmetic number, because the mean of its divisors is an integer number (30552078007).

Almost surely, 2^61104156013 is an apocalyptic number.

It is an amenable number.

61104156013 is a deficient number, since it is larger than the sum of its proper divisors (1).

61104156013 is an equidigital number, since it uses as much as digits as its factorization.

61104156013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 28.

Adding to 61104156013 its reverse (31065140116), we get a palindrome (92169296129).

The spelling of 61104156013 in words is "sixty-one billion, one hundred four million, one hundred fifty-six thousand, thirteen".