91238630748 has 12 divisors (see below), whose sum is σ = 212890138440. Its totient is φ = 30412876912.

The previous prime is 91238630731. The next prime is 91238630767. The reversal of 91238630748 is 84703683219.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 91238630748.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3801609603 + ... + 3801609626.

It is an arithmetic number, because the mean of its divisors is an integer number (17740844870).

Almost surely, 2^91238630748 is an apocalyptic number.

It is an amenable number.

91238630748 is an abundant number, since it is smaller than the sum of its proper divisors (121651507692).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91238630748 is a wasteful number, since it uses less digits than its factorization.

91238630748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7603219236 (or 7603219234 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 51.

The spelling of 91238630748 in words is "ninety-one billion, two hundred thirty-eight million, six hundred thirty thousand, seven hundred forty-eight".