87961630125541 has 2 divisors, whose sum is σ = 87961630125542. Its totient is φ = 87961630125540.

The previous prime is 87961630125443. The next prime is 87961630125623. The reversal of 87961630125541 is 14552103616978.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77601053249316 + 10360576876225 = 8809146^2 + 3218785^2 .

It is a cyclic number.

It is not a de Polignac number, because 87961630125541 - 2²¹ = 87961628028389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87961630123541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43980815062770 + 43980815062771.

It is an arithmetic number, because the mean of its divisors is an integer number (43980815062771).

It is a 1-persistent number, because it is pandigital, but 2⋅87961630125541 = 175923260251082 is not.

Almost surely, 2^{87961630125541} is an apocalyptic number.

It is an amenable number.

87961630125541 is a deficient number, since it is larger than the sum of its proper divisors (1).

87961630125541 is an equidigital number, since it uses as much as digits as its factorization.

87961630125541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10886400, while the sum is 58.

The spelling of 87961630125541 in words is "eighty-seven trillion, nine hundred sixty-one billion, six hundred thirty million, one hundred twenty-five thousand, five hundred forty-one".