157430449717 has 4 divisors (see below), whose sum is σ = 165716262880. Its totient is φ = 149144636556.

The previous prime is 157430449699. The next prime is 157430449723. The reversal of 157430449717 is 717944034751.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157430449717 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 (157430449217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4142906553 + ... + 4142906590.

It is an arithmetic number, because the mean of its divisors is an integer number (41429065720).

Almost surely, 2^157430449717 is an apocalyptic number.

It is an amenable number.

157430449717 is a deficient number, since it is larger than the sum of its proper divisors (8285813163).

157430449717 is an equidigital number, since it uses as much as digits as its factorization.

157430449717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8285813162.

The product of its (nonzero) digits is 2963520, while the sum is 52.

The spelling of 157430449717 in words is "one hundred fifty-seven billion, four hundred thirty million, four hundred forty-nine thousand, seven hundred seventeen".