158778877852 has 48 divisors (see below), whose sum is σ = 323667368640. Its totient is φ = 66739825152.

The previous prime is 158778877841. The next prime is 158778877853. The reversal of 158778877852 is 258778877851.

It is a super-2 number, since 2×158778877852² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158778877853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4387978 + ... + 4424014.

It is an arithmetic number, because the mean of its divisors is an integer number (6743070180).

Almost surely, 2^158778877852 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 158778877852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161833684320).

158778877852 is an abundant number, since it is smaller than the sum of its proper divisors (164888490788).

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

158778877852 is a wasteful number, since it uses less digits than its factorization.

158778877852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39070 (or 39068 counting only the distinct ones).

The product of its digits is 491724800, while the sum is 73.

Subtracting 158778877852 from its reverse (258778877851), we obtain a palindrome (99999999999).

The spelling of 158778877852 in words is "one hundred fifty-eight billion, seven hundred seventy-eight million, eight hundred seventy-seven thousand, eight hundred fifty-two".