1616857241 has 2 divisors, whose sum is σ = 1616857242. Its totient is φ = 1616857240.

The previous prime is 1616857237. The next prime is 1616857247. The reversal of 1616857241 is 1427586161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1128624025 + 488233216 = 33595^2 + 22096^2 .

It is a cyclic number.

It is not a de Polignac number, because 1616857241 - 2² = 1616857237 is a prime.

It is a super-2 number, since 2×1616857241² = 5228454675548264162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1616857247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 808428620 + 808428621.

It is an arithmetic number, because the mean of its divisors is an integer number (808428621).

Almost surely, 2^1616857241 is an apocalyptic number.

It is an amenable number.

1616857241 is a deficient number, since it is larger than the sum of its proper divisors (1).

1616857241 is an equidigital number, since it uses as much as digits as its factorization.

1616857241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 41.

The square root of 1616857241 is about 40210.1634042937. The cubic root of 1616857241 is about 1173.7003262859.

The spelling of 1616857241 in words is "one billion, six hundred sixteen million, eight hundred fifty-seven thousand, two hundred forty-one".