125158371577 has 4 divisors (see below), whose sum is σ = 127519850340. Its totient is φ = 122796892816.

The previous prime is 125158371557. The next prime is 125158371589. The reversal of 125158371577 is 775173851521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 775173851521 = 1901 ⋅407771621.

It can be written as a sum of positive squares in 2 ways, for example, as 47720839401 + 77437532176 = 218451^2 + 278276^2 .

It is a cyclic number.

It is not a de Polignac number, because 125158371577 - 2⁷ = 125158371449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125158371517) 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, 1180739302 + ... + 1180739407.

It is an arithmetic number, because the mean of its divisors is an integer number (31879962585).

Almost surely, 2^125158371577 is an apocalyptic number.

It is an amenable number.

125158371577 is a deficient number, since it is larger than the sum of its proper divisors (2361478763).

125158371577 is an equidigital number, since it uses as much as digits as its factorization.

125158371577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2361478762.

The product of its digits is 2058000, while the sum is 52.

The spelling of 125158371577 in words is "one hundred twenty-five billion, one hundred fifty-eight million, three hundred seventy-one thousand, five hundred seventy-seven".