125557292705545 has 4 divisors (see below), whose sum is σ = 150668751246660. Its totient is φ = 100445834164432.

The previous prime is 125557292705539. The next prime is 125557292705633. The reversal of 125557292705545 is 545507292755521.

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 46721859244921 + 78835433460624 = 6835339^2 + 8878932^2 .

It is a cyclic number.

It is not a de Polignac number, because 125557292705545 - 2⁵ = 125557292705513 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12555729270550 + ... + 12555729270559.

It is an arithmetic number, because the mean of its divisors is an integer number (37667187811665).

Almost surely, 2^{125557292705545} is an apocalyptic number.

It is an amenable number.

125557292705545 is a deficient number, since it is larger than the sum of its proper divisors (25111458541115).

125557292705545 is an equidigital number, since it uses as much as digits as its factorization.

125557292705545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25111458541114.

The product of its (nonzero) digits is 220500000, while the sum is 64.

The spelling of 125557292705545 in words is "one hundred twenty-five trillion, five hundred fifty-seven billion, two hundred ninety-two million, seven hundred five thousand, five hundred forty-five".