161764155467 has 4 divisors (see below), whose sum is σ = 161772488856. Its totient is φ = 161755822080.

The previous prime is 161764155463. The next prime is 161764155533. The reversal of 161764155467 is 764551467161.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 764551467161 = 42451 ⋅18010211.

It is a cyclic number.

It is not a de Polignac number, because 161764155467 - 2² = 161764155463 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161764155463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4137509 + ... + 4176422.

It is an arithmetic number, because the mean of its divisors is an integer number (40443122214).

Almost surely, 2^161764155467 is an apocalyptic number.

161764155467 is a deficient number, since it is larger than the sum of its proper divisors (8333389).

161764155467 is an equidigital number, since it uses as much as digits as its factorization.

161764155467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8333388.

The product of its digits is 4233600, while the sum is 53.

The spelling of 161764155467 in words is "one hundred sixty-one billion, seven hundred sixty-four million, one hundred fifty-five thousand, four hundred sixty-seven".