156681556742 has 8 divisors (see below), whose sum is σ = 237349289232. Its totient is φ = 77565127000.

The previous prime is 156681556741. The next prime is 156681556747. The reversal of 156681556742 is 247655186651.

156681556742 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×156681556742² (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 (156681556741) 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, 387825434 + ... + 387825837.

It is an arithmetic number, because the mean of its divisors is an integer number (29668661154).

Almost surely, 2^156681556742 is an apocalyptic number.

156681556742 is a deficient number, since it is larger than the sum of its proper divisors (80667732490).

156681556742 is a wasteful number, since it uses less digits than its factorization.

156681556742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775651374.

The product of its digits is 12096000, while the sum is 56.

The spelling of 156681556742 in words is "one hundred fifty-six billion, six hundred eighty-one million, five hundred fifty-six thousand, seven hundred forty-two".