158338865772 has 120 divisors (see below), whose sum is σ = 423965687376. Its totient is φ = 51502252032.

The previous prime is 158338865693. The next prime is 158338865803. The reversal of 158338865772 is 277568833851.

158338865772 is a `hidden beast` number, since 1 + 58 + 3 + 3 + 8 + 8 + 6 + 577 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 16058668 + ... + 16068524.

Almost surely, 2^158338865772 is an apocalyptic number.

158338865772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 158338865772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211982843688).

158338865772 is an abundant number, since it is smaller than the sum of its proper divisors (265626821604).

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

158338865772 is a wasteful number, since it uses less digits than its factorization.

158338865772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11069 (or 11058 counting only the distinct ones).

The product of its digits is 67737600, while the sum is 63.

The spelling of 158338865772 in words is "one hundred fifty-eight billion, three hundred thirty-eight million, eight hundred sixty-five thousand, seven hundred seventy-two".