1615606061 has 2 divisors, whose sum is σ = 1615606062. Its totient is φ = 1615606060.

The previous prime is 1615606021. The next prime is 1615606063. The reversal of 1615606061 is 1606065161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1352841961 + 262764100 = 36781^2 + 16210^2 .

It is a cyclic number.

It is not a de Polignac number, because 1615606061 - 2²² = 1611411757 is a prime.

It is a super-2 number, since 2×1615606061² = 5220365888679871442, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 1615606063, 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 (1615606063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 807803030 + 807803031.

It is an arithmetic number, because the mean of its divisors is an integer number (807803031).

Almost surely, 2^1615606061 is an apocalyptic number.

It is an amenable number.

1615606061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1615606061 is an equidigital number, since it uses as much as digits as its factorization.

1615606061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 1615606061 is about 40194.6023863901. The cubic root of 1615606061 is about 1173.3974982038.

The spelling of 1615606061 in words is "one billion, six hundred fifteen million, six hundred six thousand, sixty-one".