15778491028 has 24 divisors (see below), whose sum is σ = 28040148864. Its totient is φ = 7767328800.

The previous prime is 15778491019. The next prime is 15778491041. The reversal of 15778491028 is 82019487751.

15778491028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168258 + ... + 244678.

It is an arithmetic number, because the mean of its divisors is an integer number (1168339536).

Almost surely, 2^15778491028 is an apocalyptic number.

It is an amenable number.

15778491028 is a deficient number, since it is larger than the sum of its proper divisors (12261657836).

15778491028 is a wasteful number, since it uses less digits than its factorization.

15778491028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77223 (or 77221 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 52.

The spelling of 15778491028 in words is "fifteen billion, seven hundred seventy-eight million, four hundred ninety-one thousand, twenty-eight".