157818623749 has 8 divisors (see below), whose sum is σ = 160524647168. Its totient is φ = 155122909920.

The previous prime is 157818623723. The next prime is 157818623777. The reversal of 157818623749 is 947326818751.

157818623749 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 cyclic number.

It is not a de Polignac number, because 157818623749 - 2⁷ = 157818623621 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 (157818623449) 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 7 ways as a sum of consecutive naturals, for example, 2546517 + ... + 2607754.

It is an arithmetic number, because the mean of its divisors is an integer number (20065580896).

Almost surely, 2^157818623749 is an apocalyptic number.

It is an amenable number.

157818623749 is a deficient number, since it is larger than the sum of its proper divisors (2706023419).

157818623749 is an equidigital number, since it uses as much as digits as its factorization.

157818623749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5154795.

The product of its digits is 20321280, while the sum is 61.

The spelling of 157818623749 in words is "one hundred fifty-seven billion, eight hundred eighteen million, six hundred twenty-three thousand, seven hundred forty-nine".