161025064 has 8 divisors (see below), whose sum is σ = 301922010. Its totient is φ = 80512528.

The previous prime is 161025061. The next prime is 161025091. The reversal of 161025064 is 460520161.

It can be written as a sum of positive squares in only one way, i.e., 96864964 + 64160100 = 9842^2 + 8010^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (161025061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10064059 + ... + 10064074.

Almost surely, 2^161025064 is an apocalyptic number.

It is an amenable number.

161025064 is a deficient number, since it is larger than the sum of its proper divisors (140896946).

161025064 is a wasteful number, since it uses less digits than its factorization.

161025064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20128139 (or 20128135 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 161025064 is about 12689.5651619746. The cubic root of 161025064 is about 544.0404111416.

The spelling of 161025064 in words is "one hundred sixty-one million, twenty-five thousand, sixty-four".