91354530657 has 24 divisors (see below), whose sum is σ = 139655111904. Its totient is φ = 52911216384.

The previous prime is 91354530649. The next prime is 91354530679. The reversal of 91354530657 is 75603545319.

It is not a de Polignac number, because 91354530657 - 2³ = 91354530649 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (91354530557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5290983 + ... + 5308220.

It is an arithmetic number, because the mean of its divisors is an integer number (5818962996).

Almost surely, 2^91354530657 is an apocalyptic number.

It is an amenable number.

91354530657 is a deficient number, since it is larger than the sum of its proper divisors (48300581247).

91354530657 is a wasteful number, since it uses less digits than its factorization.

91354530657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10599249 (or 10599236 counting only the distinct ones).

The product of its (nonzero) digits is 1701000, while the sum is 48.

The spelling of 91354530657 in words is "ninety-one billion, three hundred fifty-four million, five hundred thirty thousand, six hundred fifty-seven".