91757651609 has 8 divisors (see below), whose sum is σ = 98991457152. Its totient is φ = 84548921040.

The previous prime is 91757651597. The next prime is 91757651611. The reversal of 91757651609 is 90615675719.

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 91757651609 - 2⁴ = 91757651593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91757651509) 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, 6261137 + ... + 6275774.

It is an arithmetic number, because the mean of its divisors is an integer number (12373932144).

Almost surely, 2^91757651609 is an apocalyptic number.

It is an amenable number.

91757651609 is a deficient number, since it is larger than the sum of its proper divisors (7233805543).

91757651609 is a wasteful number, since it uses less digits than its factorization.

91757651609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12537487.

The product of its (nonzero) digits is 3572100, while the sum is 56.

The spelling of 91757651609 in words is "ninety-one billion, seven hundred fifty-seven million, six hundred fifty-one thousand, six hundred nine".