91026765047 has 8 divisors (see below), whose sum is σ = 96385856976. Its totient is φ = 85668181632.

The previous prime is 91026765031. The next prime is 91026765073. The reversal of 91026765047 is 74056762019.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91026765047 - 2⁴ = 91026765031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91026764992 and 91026765010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91026765017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 278408 + ... + 509474.

It is an arithmetic number, because the mean of its divisors is an integer number (12048232122).

Almost surely, 2^91026765047 is an apocalyptic number.

91026765047 is a deficient number, since it is larger than the sum of its proper divisors (5359091929).

91026765047 is a wasteful number, since it uses less digits than its factorization.

91026765047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254257.

The product of its (nonzero) digits is 635040, while the sum is 47.

The spelling of 91026765047 in words is "ninety-one billion, twenty-six million, seven hundred sixty-five thousand, forty-seven".