157125812909 has 48 divisors (see below), whose sum is σ = 188144535600. Its totient is φ = 129980049408.

The previous prime is 157125812897. The next prime is 157125812917. The reversal of 157125812909 is 909218521751.

157125812909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 80048809 + 157045764100 = 8947^2 + 396290^2 .

It is not a de Polignac number, because 157125812909 - 2¹² = 157125808813 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157125812959) 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 47 ways as a sum of consecutive naturals, for example, 26769227 + ... + 26775095.

It is an arithmetic number, because the mean of its divisors is an integer number (3919677825).

Almost surely, 2^157125812909 is an apocalyptic number.

It is an amenable number.

157125812909 is a deficient number, since it is larger than the sum of its proper divisors (31018722691).

157125812909 is a wasteful number, since it uses less digits than its factorization.

157125812909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6174 (or 6151 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 50.

The spelling of 157125812909 in words is "one hundred fifty-seven billion, one hundred twenty-five million, eight hundred twelve thousand, nine hundred nine".