125616036444661 has 32 divisors (see below), whose sum is σ = 148677584428800. Its totient is φ = 103841937239040.

The previous prime is 125616036444637. The next prime is 125616036444713. The reversal of 125616036444661 is 166444630616521.

It is not a de Polignac number, because 125616036444661 - 2³³ = 125607446510069 is a prime.

It is a super-2 number, since 2×125616036444661² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125616036444611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 909276130 + ... + 909414268.

It is an arithmetic number, because the mean of its divisors is an integer number (4646174513400).

Almost surely, 2^{125616036444661} is an apocalyptic number.

It is an amenable number.

125616036444661 is a deficient number, since it is larger than the sum of its proper divisors (23061547984139).

125616036444661 is a wasteful number, since it uses less digits than its factorization.

125616036444661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143149.

The product of its (nonzero) digits is 14929920, while the sum is 55.

The spelling of 125616036444661 in words is "one hundred twenty-five trillion, six hundred sixteen billion, thirty-six million, four hundred forty-four thousand, six hundred sixty-one".