91010005051 has 8 divisors (see below), whose sum is σ = 104830423040. Its totient is φ = 77394334248.

The previous prime is 91010005049. The next prime is 91010005057. The reversal of 91010005051 is 15050001019.

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

It is not a de Polignac number, because 91010005051 - 2¹ = 91010005049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91010005057) 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 7 ways as a sum of consecutive naturals, for example, 51185841 + ... + 51187618.

It is an arithmetic number, because the mean of its divisors is an integer number (13103802880).

Almost surely, 2^91010005051 is an apocalyptic number.

91010005051 is a deficient number, since it is larger than the sum of its proper divisors (13820417989).

91010005051 is a wasteful number, since it uses less digits than its factorization.

91010005051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102373593.

The product of its (nonzero) digits is 225, while the sum is 22.

The spelling of 91010005051 in words is "ninety-one billion, ten million, five thousand, fifty-one".