91363641028 has 48 divisors (see below), whose sum is σ = 176234595264. Its totient is φ = 41098048640.

The previous prime is 91363641007. The next prime is 91363641133. The reversal of 91363641028 is 82014636319.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4759626 + ... + 4778782.

It is an arithmetic number, because the mean of its divisors is an integer number (3671554068).

Almost surely, 2^91363641028 is an apocalyptic number.

It is an amenable number.

91363641028 is a deficient number, since it is larger than the sum of its proper divisors (84870954236).

91363641028 is a wasteful number, since it uses less digits than its factorization.

91363641028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20292 (or 20290 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 43.

The spelling of 91363641028 in words is "ninety-one billion, three hundred sixty-three million, six hundred forty-one thousand, twenty-eight".