91312856401 has 8 divisors (see below), whose sum is σ = 98432316864. Its totient is φ = 84207023760.

The previous prime is 91312856389. The next prime is 91312856429. The reversal of 91312856401 is 10465821319.

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 91312856401 - 2⁹ = 91312855889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91312856441) 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, 3393031 + ... + 3419836.

It is an arithmetic number, because the mean of its divisors is an integer number (12304039608).

Almost surely, 2^91312856401 is an apocalyptic number.

It is an amenable number.

91312856401 is a deficient number, since it is larger than the sum of its proper divisors (7119460463).

91312856401 is a wasteful number, since it uses less digits than its factorization.

91312856401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6813911.

The product of its (nonzero) digits is 51840, while the sum is 40.

The spelling of 91312856401 in words is "ninety-one billion, three hundred twelve million, eight hundred fifty-six thousand, four hundred one".