91457308709908 has 12 divisors (see below), whose sum is σ = 160640881721152. Its totient is φ = 45559913932440.

The previous prime is 91457308709867. The next prime is 91457308709929. The reversal of 91457308709908 is 80990780375419.

It is a super-3 number, since 3×91457308709908³ (a number of 43 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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, 42185104410 + ... + 42185106577.

Almost surely, 2^{91457308709908} is an apocalyptic number.

It is an amenable number.

91457308709908 is a deficient number, since it is larger than the sum of its proper divisors (69183573011244).

91457308709908 is a wasteful number, since it uses less digits than its factorization.

91457308709908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84370211262 (or 84370211260 counting only the distinct ones).

The product of its (nonzero) digits is 137168640, while the sum is 70.

The spelling of 91457308709908 in words is "ninety-one trillion, four hundred fifty-seven billion, three hundred eight million, seven hundred nine thousand, nine hundred eight".