161645435 has 32 divisors (see below), whose sum is σ = 237012480. Its totient is φ = 103306752.

The previous prime is 161645431. The next prime is 161645437. The reversal of 161645435 is 534546161.

161645435 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 161645435 - 2² = 161645431 is a prime.

It is a super-2 number, since 2×161645435² = 52258493312678450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a junction number, because it is equal to n+sod(n) for n = 161645395 and 161645404.

It is not an unprimeable number, because it can be changed into a prime (161645431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62396 + ... + 64934.

It is an arithmetic number, because the mean of its divisors is an integer number (7406640).

Almost surely, 2^161645435 is an apocalyptic number.

161645435 is a deficient number, since it is larger than the sum of its proper divisors (75367045).

161645435 is a wasteful number, since it uses less digits than its factorization.

161645435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2675.

The product of its digits is 43200, while the sum is 35.

The square root of 161645435 is about 12713.9858030438. The cubic root of 161645435 is about 544.7381790965.

The spelling of 161645435 in words is "one hundred sixty-one million, six hundred forty-five thousand, four hundred thirty-five".