91488705157 has 2 divisors, whose sum is σ = 91488705158. Its totient is φ = 91488705156.

The previous prime is 91488705107. The next prime is 91488705169. The reversal of 91488705157 is 75150788419.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60830796321 + 30657908836 = 246639^2 + 175094^2 .

It is a cyclic number.

It is not a de Polignac number, because 91488705157 - 2¹¹ = 91488703109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91488705098 and 91488705107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91488705107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45744352578 + 45744352579.

It is an arithmetic number, because the mean of its divisors is an integer number (45744352579).

Almost surely, 2^91488705157 is an apocalyptic number.

It is an amenable number.

91488705157 is a deficient number, since it is larger than the sum of its proper divisors (1).

91488705157 is an equidigital number, since it uses as much as digits as its factorization.

91488705157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2822400, while the sum is 55.

The spelling of 91488705157 in words is "ninety-one billion, four hundred eighty-eight million, seven hundred five thousand, one hundred fifty-seven".