158778877851 has 120 divisors (see below), whose sum is σ = 268271936400. Its totient is φ = 90319743360.

The previous prime is 158778877841. The next prime is 158778877853.

158778877851 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 158778877851 - 2²³ = 158770489243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 158778877851.

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 119 ways as a sum of consecutive naturals, for example, 141387576 + ... + 141388698.

It is an arithmetic number, because the mean of its divisors is an integer number (2235599470).

Almost surely, 2^158778877851 is an apocalyptic number.

158778877851 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

158778877851 is a deficient number, since it is larger than the sum of its proper divisors (109493058549).

158778877851 is a wasteful number, since it uses less digits than its factorization.

158778877851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1239 (or 1203 counting only the distinct ones).

The product of its digits is 245862400, while the sum is 72.

The spelling of 158778877851 in words is "one hundred fifty-eight billion, seven hundred seventy-eight million, eight hundred seventy-seven thousand, eight hundred fifty-one".