161477521144577 has 12 divisors (see below), whose sum is σ = 177498387677520. Its totient is φ = 146792315211960.

The previous prime is 161477521144573. The next prime is 161477521144591. The reversal of 161477521144577 is 775441125774161.

It is a happy number.

It is not a de Polignac number, because 161477521144577 - 2² = 161477521144573 is a prime.

It is a hoax number, since the sum of its digits (62) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161477521144573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21401927 + ... + 27946332.

It is an arithmetic number, because the mean of its divisors is an integer number (14791532306460).

Almost surely, 2^{161477521144577} is an apocalyptic number.

It is an amenable number.

161477521144577 is a deficient number, since it is larger than the sum of its proper divisors (16020866532943).

161477521144577 is a wasteful number, since it uses less digits than its factorization.

161477521144577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49375324 (or 49375313 counting only the distinct ones).

The product of its digits is 46099200, while the sum is 62.

The spelling of 161477521144577 in words is "one hundred sixty-one trillion, four hundred seventy-seven billion, five hundred twenty-one million, one hundred forty-four thousand, five hundred seventy-seven".