161053623 has 8 divisors (see below), whose sum is σ = 238598000. Its totient is φ = 107369064.

The previous prime is 161053621. The next prime is 161053661. The reversal of 161053623 is 326350161.

It is not a de Polignac number, because 161053623 - 2¹ = 161053621 is a prime.

It is a super-2 number, since 2×161053623² = 51876538962852258, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 5964949 = 161053623 / (1 + 6 + 1 + 0 + 5 + 3 + 6 + 2 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161053621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2982448 + ... + 2982501.

It is an arithmetic number, because the mean of its divisors is an integer number (29824750).

Almost surely, 2^161053623 is an apocalyptic number.

161053623 is a deficient number, since it is larger than the sum of its proper divisors (77544377).

161053623 is an equidigital number, since it uses as much as digits as its factorization.

161053623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5964958 (or 5964952 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 161053623 is about 12690.6904067509. The cubic root of 161053623 is about 544.0725724529.

The spelling of 161053623 in words is "one hundred sixty-one million, fifty-three thousand, six hundred twenty-three".