91672065774507 has 16 divisors (see below), whose sum is σ = 125547122405120. Its totient is φ = 59456233606752.

The previous prime is 91672065774503. The next prime is 91672065774551. The reversal of 91672065774507 is 70547756027619.

It is not a de Polignac number, because 91672065774507 - 2² = 91672065774503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91672065774503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45736513 + ... + 47698770.

It is an arithmetic number, because the mean of its divisors is an integer number (7846695150320).

Almost surely, 2^{91672065774507} is an apocalyptic number.

91672065774507 is a deficient number, since it is larger than the sum of its proper divisors (33875056630613).

91672065774507 is a wasteful number, since it uses less digits than its factorization.

91672065774507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93444162.

The product of its (nonzero) digits is 155584800, while the sum is 66.

The spelling of 91672065774507 in words is "ninety-one trillion, six hundred seventy-two billion, sixty-five million, seven hundred seventy-four thousand, five hundred seven".