161012529 has 24 divisors (see below), whose sum is σ = 242860800. Its totient is φ = 106597296.

The previous prime is 161012473. The next prime is 161012539. The reversal of 161012529 is 925210161.

161012529 is a `hidden beast` number, since 1 + 610 + 1 + 25 + 29 = 666.

161012529 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161012529 - 2⁸ = 161012273 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (161012539) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33984 + ... + 38430.

It is an arithmetic number, because the mean of its divisors is an integer number (10119200).

Almost surely, 2^161012529 is an apocalyptic number.

It is an amenable number.

161012529 is a deficient number, since it is larger than the sum of its proper divisors (81848271).

161012529 is an equidigital number, since it uses as much as digits as its factorization.

161012529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4611 (or 4599 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 161012529 is about 12689.0712426087. The cubic root of 161012529 is about 544.0262938289.

The spelling of 161012529 in words is "one hundred sixty-one million, twelve thousand, five hundred twenty-nine".