158721964 has 24 divisors (see below), whose sum is σ = 280597968. Its totient is φ = 78555840.

The previous prime is 158721917. The next prime is 158721967. The reversal of 158721964 is 469127851.

It is a self number, because there is not a number n which added to its sum of digits gives 158721964.

It is not an unprimeable number, because it can be changed into a prime (158721967) 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, 239794 + ... + 240454.

It is an arithmetic number, because the mean of its divisors is an integer number (11691582).

Almost surely, 2^158721964 is an apocalyptic number.

It is an amenable number.

158721964 is a deficient number, since it is larger than the sum of its proper divisors (121876004).

158721964 is a wasteful number, since it uses less digits than its factorization.

158721964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1185 (or 1183 counting only the distinct ones).

The product of its digits is 120960, while the sum is 43.

The square root of 158721964 is about 12598.4905445057. The cubic root of 158721964 is about 541.4341893842.

The spelling of 158721964 in words is "one hundred fifty-eight million, seven hundred twenty-one thousand, nine hundred sixty-four".