125515445144521 has 8 divisors (see below), whose sum is σ = 125804666139264. Its totient is φ = 125226250684080.

The previous prime is 125515445144431. The next prime is 125515445144543. The reversal of 125515445144521 is 125441544515521.

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 125515445144521 - 2¹³ = 125515445136329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125515445144591) 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, 2853555 + ... + 16098871.

It is an arithmetic number, because the mean of its divisors is an integer number (15725583267408).

Almost surely, 2^{125515445144521} is an apocalyptic number.

It is an amenable number.

125515445144521 is a deficient number, since it is larger than the sum of its proper divisors (289220994743).

125515445144521 is a wasteful number, since it uses less digits than its factorization.

125515445144521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13267151.

The product of its digits is 3200000, while the sum is 49.

The spelling of 125515445144521 in words is "one hundred twenty-five trillion, five hundred fifteen billion, four hundred forty-five million, one hundred forty-four thousand, five hundred twenty-one".