157667216709 has 4 divisors (see below), whose sum is σ = 210222955616. Its totient is φ = 105111477804.

The previous prime is 157667216689. The next prime is 157667216723. The reversal of 157667216709 is 907612766751.

It is a happy number.

157667216709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 157667216709 - 2⁵ = 157667216677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157667216009) 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, 26277869449 + ... + 26277869454.

It is an arithmetic number, because the mean of its divisors is an integer number (52555738904).

Almost surely, 2^157667216709 is an apocalyptic number.

It is an amenable number.

157667216709 is a deficient number, since it is larger than the sum of its proper divisors (52555738907).

157667216709 is an equidigital number, since it uses as much as digits as its factorization.

157667216709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52555738906.

The product of its (nonzero) digits is 6667920, while the sum is 57.

The spelling of 157667216709 in words is "one hundred fifty-seven billion, six hundred sixty-seven million, two hundred sixteen thousand, seven hundred nine".