125633740961 has 4 divisors (see below), whose sum is σ = 126404500272. Its totient is φ = 124862981652.

The previous prime is 125633740933. The next prime is 125633740987. The reversal of 125633740961 is 169047336521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 125633740961 - 2¹⁴ = 125633724577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125633740931) 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, 385379411 + ... + 385379736.

It is an arithmetic number, because the mean of its divisors is an integer number (31601125068).

Almost surely, 2^125633740961 is an apocalyptic number.

It is an amenable number.

125633740961 is a deficient number, since it is larger than the sum of its proper divisors (770759311).

125633740961 is an equidigital number, since it uses as much as digits as its factorization.

125633740961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770759310.

The product of its (nonzero) digits is 816480, while the sum is 47.

The spelling of 125633740961 in words is "one hundred twenty-five billion, six hundred thirty-three million, seven hundred forty thousand, nine hundred sixty-one".