91587478601 has 8 divisors (see below), whose sum is σ = 95572612800. Its totient is φ = 87602600272.

The previous prime is 91587478537. The next prime is 91587478607. The reversal of 91587478601 is 10687478519.

It is a happy number.

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 91587478601 - 2⁶ = 91587478537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91587478607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1194446 + ... + 1268808.

It is an arithmetic number, because the mean of its divisors is an integer number (11946576600).

Almost surely, 2^91587478601 is an apocalyptic number.

It is an amenable number.

91587478601 is a deficient number, since it is larger than the sum of its proper divisors (3985134199).

91587478601 is a wasteful number, since it uses less digits than its factorization.

91587478601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127935.

The product of its (nonzero) digits is 3386880, while the sum is 56.

The spelling of 91587478601 in words is "ninety-one billion, five hundred eighty-seven million, four hundred seventy-eight thousand, six hundred one".