91556551603 has 8 divisors (see below), whose sum is σ = 99883975536. Its totient is φ = 83229811200.

The previous prime is 91556551579. The next prime is 91556551607. The reversal of 91556551603 is 30615565519.

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 91556551603 - 2⁵ = 91556551571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91556551607) 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, 132643 + ... + 448003.

It is an arithmetic number, because the mean of its divisors is an integer number (12485496942).

Almost surely, 2^91556551603 is an apocalyptic number.

91556551603 is a deficient number, since it is larger than the sum of its proper divisors (8327423933).

91556551603 is a wasteful number, since it uses less digits than its factorization.

91556551603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341765.

The product of its (nonzero) digits is 607500, while the sum is 46.

The spelling of 91556551603 in words is "ninety-one billion, five hundred fifty-six million, five hundred fifty-one thousand, six hundred three".