125552851144561 has 32 divisors (see below), whose sum is σ = 136376502612480. Its totient is φ = 115150317735936.

The previous prime is 125552851144543. The next prime is 125552851144601. The reversal of 125552851144561 is 165441158255521.

It is a cyclic number.

It is not a de Polignac number, because 125552851144561 - 2¹⁷ = 125552851013489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125552851144261) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57402360 + ... + 59549446.

It is an arithmetic number, because the mean of its divisors is an integer number (4261765706640).

Almost surely, 2^{125552851144561} is an apocalyptic number.

It is an amenable number.

125552851144561 is a deficient number, since it is larger than the sum of its proper divisors (10823651467919).

125552851144561 is a wasteful number, since it uses less digits than its factorization.

125552851144561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2147673.

The product of its digits is 9600000, while the sum is 55.

The spelling of 125552851144561 in words is "one hundred twenty-five trillion, five hundred fifty-two billion, eight hundred fifty-one million, one hundred forty-four thousand, five hundred sixty-one".