616148261 has 2 divisors, whose sum is σ = 616148262. Its totient is φ = 616148260.

The previous prime is 616148249. The next prime is 616148263. The reversal of 616148261 is 162841616.

616148261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 335585761 + 280562500 = 18319^2 + 16750^2 .

It is a cyclic number.

It is not a de Polignac number, because 616148261 - 2¹⁰ = 616147237 is a prime.

It is a Sophie Germain prime.

Together with 616148263, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (616148263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308074130 + 308074131.

It is an arithmetic number, because the mean of its divisors is an integer number (308074131).

Almost surely, 2^616148261 is an apocalyptic number.

It is an amenable number.

616148261 is a deficient number, since it is larger than the sum of its proper divisors (1).

616148261 is an equidigital number, since it uses as much as digits as its factorization.

616148261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 35.

The square root of 616148261 is about 24822.3339152466. Note that the first 3 decimals coincide. The cubic root of 616148261 is about 850.9324305196.

Adding to 616148261 its reverse (162841616), we get a palindrome (778989877).

It can be divided in two parts, 616 and 148261, that added together give a cube (148877 = 53³).

The spelling of 616148261 in words is "six hundred sixteen million, one hundred forty-eight thousand, two hundred sixty-one".