125000015545 has 4 divisors (see below), whose sum is σ = 150000018660. Its totient is φ = 100000012432.

The previous prime is 125000015533. The next prime is 125000015561. The reversal of 125000015545 is 545510000521.

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 62064760384 + 62935255161 = 249128^2 + 250869^2 .

It is a cyclic number.

It is not a de Polignac number, because 125000015545 - 2¹⁷ = 124999884473 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, 12500001550 + ... + 12500001559.

It is an arithmetic number, because the mean of its divisors is an integer number (37500004665).

Almost surely, 2^125000015545 is an apocalyptic number.

It is an amenable number.

125000015545 is a deficient number, since it is larger than the sum of its proper divisors (25000003115).

125000015545 is an equidigital number, since it uses as much as digits as its factorization.

125000015545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25000003114.

The product of its (nonzero) digits is 5000, while the sum is 28.

The spelling of 125000015545 in words is "one hundred twenty-five billion, fifteen thousand, five hundred forty-five".