125371784045 has 4 divisors (see below), whose sum is σ = 150446140860. Its totient is φ = 100297427232.

The previous prime is 125371784029. The next prime is 125371784047. The reversal of 125371784045 is 540487173521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 540487173521 = 23 ⋅23499442327.

It can be written as a sum of positive squares in 2 ways, for example, as 54391101961 + 70980682084 = 233219^2 + 266422^2 .

It is a cyclic number.

It is not a de Polignac number, because 125371784045 - 2⁴ = 125371784029 is a prime.

It is a super-2 number, since 2×125371784045² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125371784047) 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, 12537178400 + ... + 12537178409.

It is an arithmetic number, because the mean of its divisors is an integer number (37611535215).

Almost surely, 2^125371784045 is an apocalyptic number.

It is an amenable number.

125371784045 is a deficient number, since it is larger than the sum of its proper divisors (25074356815).

125371784045 is an equidigital number, since it uses as much as digits as its factorization.

125371784045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25074356814.

The product of its (nonzero) digits is 940800, while the sum is 47.

The spelling of 125371784045 in words is "one hundred twenty-five billion, three hundred seventy-one million, seven hundred eighty-four thousand, forty-five".