161510161247 has 2 divisors, whose sum is σ = 161510161248. Its totient is φ = 161510161246.

The previous prime is 161510161243. The next prime is 161510161261. The reversal of 161510161247 is 742161015161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161510161247 - 2² = 161510161243 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161510161243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80755080623 + 80755080624.

It is an arithmetic number, because the mean of its divisors is an integer number (80755080624).

Almost surely, 2^161510161247 is an apocalyptic number.

161510161247 is a deficient number, since it is larger than the sum of its proper divisors (1).

161510161247 is an equidigital number, since it uses as much as digits as its factorization.

161510161247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 35.

The spelling of 161510161247 in words is "one hundred sixty-one billion, five hundred ten million, one hundred sixty-one thousand, two hundred forty-seven".