15779818842 has 16 divisors (see below), whose sum is σ = 31561299552. Its totient is φ = 5259662640.

The previous prime is 15779818837. The next prime is 15779818849. The reversal of 15779818842 is 24881897751.

It is not an unprimeable number, because it can be changed into a prime (15779818849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78417 + ... + 194187.

It is an arithmetic number, because the mean of its divisors is an integer number (1972581222).

Almost surely, 2^15779818842 is an apocalyptic number.

15779818842 is an abundant number, since it is smaller than the sum of its proper divisors (15781480710).

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

15779818842 is a wasteful number, since it uses less digits than its factorization.

15779818842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138493.

The product of its digits is 9031680, while the sum is 60.

The spelling of 15779818842 in words is "fifteen billion, seven hundred seventy-nine million, eight hundred eighteen thousand, eight hundred forty-two".