156998778656 has 24 divisors (see below), whose sum is σ = 309982120560. Its totient is φ = 78273160768.

The previous prime is 156998778631. The next prime is 156998778659. The reversal of 156998778656 is 656877899651.

156998778656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (156998778659) 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 3 ways as a sum of consecutive naturals, for example, 7058366 + ... + 7080573.

It is an arithmetic number, because the mean of its divisors is an integer number (12915921690).

Almost surely, 2^156998778656 is an apocalyptic number.

156998778656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

156998778656 is a deficient number, since it is larger than the sum of its proper divisors (152983341904).

156998778656 is a wasteful number, since it uses less digits than its factorization.

156998778656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14139296 (or 14139288 counting only the distinct ones).

The product of its digits is 1371686400, while the sum is 77.

The spelling of 156998778656 in words is "one hundred fifty-six billion, nine hundred ninety-eight million, seven hundred seventy-eight thousand, six hundred fifty-six".