125541021653 has 8 divisors (see below), whose sum is σ = 126980106840. Its totient is φ = 124102570240.

The previous prime is 125541021623. The next prime is 125541021733. The reversal of 125541021653 is 356120145521.

It can be written as a sum of positive squares in 4 ways, for example, as 3319684 + 125537701969 = 1822^2 + 354313^2 .

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 125541021653 - 2¹² = 125541017557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125541021623) 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, 245873 + ... + 558153.

It is an arithmetic number, because the mean of its divisors is an integer number (15872513355).

Almost surely, 2^125541021653 is an apocalyptic number.

It is an amenable number.

125541021653 is a deficient number, since it is larger than the sum of its proper divisors (1439085187).

125541021653 is an equidigital number, since it uses as much as digits as its factorization.

125541021653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316887.

The product of its (nonzero) digits is 36000, while the sum is 35.

The spelling of 125541021653 in words is "one hundred twenty-five billion, five hundred forty-one million, twenty-one thousand, six hundred fifty-three".