156668888899999 has 8 divisors (see below), whose sum is σ = 179625882728448. Its totient is φ = 133855826067960.

The previous prime is 156668888899993. The next prime is 156668888900009. The reversal of 156668888899999 is 999998888866651.

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

It is a cyclic number.

It is not a de Polignac number, because 156668888899999 - 2³⁵ = 156634529161631 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 156668888899895 and 156668888899904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156668888899993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35982746767 + ... + 35982751120.

It is an arithmetic number, because the mean of its divisors is an integer number (22453235341056).

Almost surely, 2^{156668888899999} is an apocalyptic number.

156668888899999 is a deficient number, since it is larger than the sum of its proper divisors (22956993828449).

156668888899999 is an equidigital number, since it uses as much as digits as its factorization.

156668888899999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71965498205.

The product of its digits is 2089711042560, while the sum is 109.

The spelling of 156668888899999 in words is "one hundred fifty-six trillion, six hundred sixty-eight billion, eight hundred eighty-eight million, eight hundred ninety-nine thousand, nine hundred ninety-nine".