158728122450 has 336 divisors, whose sum is σ = 452626733160. Its totient is φ = 41385738240.

The previous prime is 158728122437. The next prime is 158728122473. The reversal of 158728122450 is 54221827851.

158728122450 is a `hidden beast` number, since 1 + 5 + 8 + 72 + 8 + 122 + 450 = 666.

It can be written as a sum of positive squares in 12 ways, for example, as 31687916121 + 127040206329 = 178011^2 + 356427^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 158728122396 and 158728122405.

It is an unprimeable number.

It is a polite number, since it can be written in 167 ways as a sum of consecutive naturals, for example, 366577434 + ... + 366577866.

Almost surely, 2^158728122450 is an apocalyptic number.

158728122450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 158728122450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (226313366580).

158728122450 is an abundant number, since it is smaller than the sum of its proper divisors (293898610710).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

158728122450 is a wasteful number, since it uses less digits than its factorization.

158728122450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665 (or 645 counting only the distinct ones).

The product of its (nonzero) digits is 358400, while the sum is 45.

The spelling of 158728122450 in words is "one hundred fifty-eight billion, seven hundred twenty-eight million, one hundred twenty-two thousand, four hundred fifty".