158475028381 has 4 divisors (see below), whose sum is σ = 167797088892. Its totient is φ = 149152967872.

The previous prime is 158475028357. The next prime is 158475028391. The reversal of 158475028381 is 183820574851.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 183820574851 = 71 ⋅2589022181.

It can be written as a sum of positive squares in 2 ways, for example, as 80931715225 + 77543313156 = 284485^2 + 278466^2 .

It is a cyclic number.

It is not a de Polignac number, because 158475028381 - 2¹³ = 158475020189 is a prime.

It is a super-2 number, since 2×158475028381² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158475028391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4661030230 + ... + 4661030263.

It is an arithmetic number, because the mean of its divisors is an integer number (41949272223).

Almost surely, 2^158475028381 is an apocalyptic number.

It is an amenable number.

158475028381 is a deficient number, since it is larger than the sum of its proper divisors (9322060511).

158475028381 is an equidigital number, since it uses as much as digits as its factorization.

158475028381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9322060510.

The product of its (nonzero) digits is 2150400, while the sum is 52.

The spelling of 158475028381 in words is "one hundred fifty-eight billion, four hundred seventy-five million, twenty-eight thousand, three hundred eighty-one".