161451171487 has 2 divisors, whose sum is σ = 161451171488. Its totient is φ = 161451171486.

The previous prime is 161451171443. The next prime is 161451171547. The reversal of 161451171487 is 784171154161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161451171487 - 2¹⁹ = 161450647199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161451171187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80725585743 + 80725585744.

It is an arithmetic number, because the mean of its divisors is an integer number (80725585744).

Almost surely, 2^161451171487 is an apocalyptic number.

161451171487 is a deficient number, since it is larger than the sum of its proper divisors (1).

161451171487 is an equidigital number, since it uses as much as digits as its factorization.

161451171487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 188160, while the sum is 46.

The spelling of 161451171487 in words is "one hundred sixty-one billion, four hundred fifty-one million, one hundred seventy-one thousand, four hundred eighty-seven".