157428743173 has 4 divisors (see below), whose sum is σ = 169538646508. Its totient is φ = 145318839840.

The previous prime is 157428743113. The next prime is 157428743183. The reversal of 157428743173 is 371347824751.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 108941583969 + 48487159204 = 330063^2 + 220198^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157428743173 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 157428743173.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157428743113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6054951648 + ... + 6054951673.

It is an arithmetic number, because the mean of its divisors is an integer number (42384661627).

Almost surely, 2^157428743173 is an apocalyptic number.

157428743173 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

157428743173 is a deficient number, since it is larger than the sum of its proper divisors (12109903335).

157428743173 is a wasteful number, since it uses less digits than its factorization.

157428743173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12109903334.

The product of its digits is 3951360, while the sum is 52.

It can be divided in two parts, 157428 and 743173, that added together give a square (900601 = 949²).

The spelling of 157428743173 in words is "one hundred fifty-seven billion, four hundred twenty-eight million, seven hundred forty-three thousand, one hundred seventy-three".