91260741261 has 4 divisors (see below), whose sum is σ = 121680988352. Its totient is φ = 60840494172.

The previous prime is 91260741259. The next prime is 91260741289. The reversal of 91260741261 is 16214706219.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16214706219 = 3 ⋅5404902073.

It is not a de Polignac number, because 91260741261 - 2¹ = 91260741259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91260741241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15210123541 + ... + 15210123546.

It is an arithmetic number, because the mean of its divisors is an integer number (30420247088).

Almost surely, 2^91260741261 is an apocalyptic number.

It is an amenable number.

91260741261 is a deficient number, since it is larger than the sum of its proper divisors (30420247091).

91260741261 is a wasteful number, since it uses less digits than its factorization.

91260741261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30420247090.

The product of its (nonzero) digits is 36288, while the sum is 39.

The spelling of 91260741261 in words is "ninety-one billion, two hundred sixty million, seven hundred forty-one thousand, two hundred sixty-one".