161512928957951 has 2 divisors, whose sum is σ = 161512928957952. Its totient is φ = 161512928957950.

The previous prime is 161512928957879. The next prime is 161512928957959. The reversal of 161512928957951 is 159759829215161.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161512928957951 is a prime.

It is a super-2 number, since 2×161512928957951² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161512928957959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80756464478975 + 80756464478976.

It is an arithmetic number, because the mean of its divisors is an integer number (80756464478976).

Almost surely, 2^{161512928957951} is an apocalyptic number.

161512928957951 is a deficient number, since it is larger than the sum of its proper divisors (1).

161512928957951 is an equidigital number, since it uses as much as digits as its factorization.

161512928957951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472000, while the sum is 71.

The spelling of 161512928957951 in words is "one hundred sixty-one trillion, five hundred twelve billion, nine hundred twenty-eight million, nine hundred fifty-seven thousand, nine hundred fifty-one".