125993601649 has 8 divisors (see below), whose sum is σ = 129558419648. Its totient is φ = 122437182960.

The previous prime is 125993601647. The next prime is 125993601697. The reversal of 125993601649 is 946106399521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125993601649 - 2¹ = 125993601647 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125993601649.

It is not an unprimeable number, because it can be changed into a prime (125993601641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2069397 + ... + 2129410.

It is an arithmetic number, because the mean of its divisors is an integer number (16194802456).

Almost surely, 2^125993601649 is an apocalyptic number.

It is an amenable number.

125993601649 is a deficient number, since it is larger than the sum of its proper divisors (3564817999).

125993601649 is an equidigital number, since it uses as much as digits as its factorization.

125993601649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4199655.

The product of its (nonzero) digits is 3149280, while the sum is 55.

The spelling of 125993601649 in words is "one hundred twenty-five billion, nine hundred ninety-three million, six hundred one thousand, six hundred forty-nine".