157525812009509 has 8 divisors (see below), whose sum is σ = 159166683465048. Its totient is φ = 155885285329920.

The previous prime is 157525812009463. The next prime is 157525812009611. The reversal of 157525812009509 is 905900218525751.

It can be written as a sum of positive squares in 4 ways, for example, as 6620483380900 + 150905328628609 = 2573030^2 + 12284353^2 .

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 157525812009509 - 2¹² = 157525812005413 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 (157525812002509) 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, 85275392 + ... + 87103065.

It is an arithmetic number, because the mean of its divisors is an integer number (19895835433131).

Almost surely, 2^{157525812009509} is an apocalyptic number.

It is an amenable number.

157525812009509 is a deficient number, since it is larger than the sum of its proper divisors (1640871455539).

157525812009509 is an equidigital number, since it uses as much as digits as its factorization.

157525812009509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172387975.

The product of its (nonzero) digits is 11340000, while the sum is 59.

The spelling of 157525812009509 in words is "one hundred fifty-seven trillion, five hundred twenty-five billion, eight hundred twelve million, nine thousand, five hundred nine".