158198481 has 64 divisors (see below), whose sum is σ = 289267200. Its totient is φ = 83386368.

The previous prime is 158198477. The next prime is 158198563. The reversal of 158198481 is 184891851.

158198481 is a `hidden beast` number, since 1 + 5 + 81 + 98 + 481 = 666.

It is not a de Polignac number, because 158198481 - 2² = 158198477 is a prime.

It is a super-2 number, since 2×158198481² = 50053518781414722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (158198441) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 169825 + ... + 170753.

It is an arithmetic number, because the mean of its divisors is an integer number (4519800).

Almost surely, 2^158198481 is an apocalyptic number.

It is an amenable number.

158198481 is a deficient number, since it is larger than the sum of its proper divisors (131068719).

158198481 is a wasteful number, since it uses less digits than its factorization.

158198481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1015 (or 1009 counting only the distinct ones).

The product of its digits is 92160, while the sum is 45.

The square root of 158198481 is about 12577.6977623093. The cubic root of 158198481 is about 540.8382967191.

The spelling of 158198481 in words is "one hundred fifty-eight million, one hundred ninety-eight thousand, four hundred eighty-one".