161624015477 has 8 divisors (see below), whose sum is σ = 168852678840. Its totient is φ = 154505713600.

The previous prime is 161624015471. The next prime is 161624015521. The reversal of 161624015477 is 774510426161.

It can be written as a sum of positive squares in 4 ways, for example, as 47818318276 + 113805697201 = 218674^2 + 337351^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161624015477 - 2²² = 161619821173 is a prime.

It is a super-2 number, since 2×161624015477² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161624015471) 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 7 ways as a sum of consecutive naturals, for example, 27587378 + ... + 27593235.

It is an arithmetic number, because the mean of its divisors is an integer number (21106584855).

Almost surely, 2^161624015477 is an apocalyptic number.

It is an amenable number.

161624015477 is a deficient number, since it is larger than the sum of its proper divisors (7228663363).

161624015477 is a wasteful number, since it uses less digits than its factorization.

161624015477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55180743.

The product of its (nonzero) digits is 282240, while the sum is 44.

The spelling of 161624015477 in words is "one hundred sixty-one billion, six hundred twenty-four million, fifteen thousand, four hundred seventy-seven".