91550420341 has 2 divisors, whose sum is σ = 91550420342. Its totient is φ = 91550420340.

The previous prime is 91550420281. The next prime is 91550420359. The reversal of 91550420341 is 14302405519.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77309578116 + 14240842225 = 278046^2 + 119335^2 .

It is a cyclic number.

It is not a de Polignac number, because 91550420341 - 2¹¹ = 91550418293 is a prime.

It is a super-2 number, since 2×91550420341² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 91550420297 and 91550420306.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91550427341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45775210170 + 45775210171.

It is an arithmetic number, because the mean of its divisors is an integer number (45775210171).

Almost surely, 2^91550420341 is an apocalyptic number.

It is an amenable number.

91550420341 is a deficient number, since it is larger than the sum of its proper divisors (1).

91550420341 is an equidigital number, since it uses as much as digits as its factorization.

91550420341 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 91550420341 in words is "ninety-one billion, five hundred fifty million, four hundred twenty thousand, three hundred forty-one".