91278950752 has 48 divisors (see below), whose sum is σ = 200823843024. Its totient is φ = 40478464000.

The previous prime is 91278950747. The next prime is 91278950797. The reversal of 91278950752 is 25705987219.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 91278950693 and 91278950702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3147949 + ... + 3176812.

It is an arithmetic number, because the mean of its divisors is an integer number (4183830063).

Almost surely, 2^91278950752 is an apocalyptic number.

It is an amenable number.

91278950752 is an abundant number, since it is smaller than the sum of its proper divisors (109544892272).

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

91278950752 is a wasteful number, since it uses less digits than its factorization.

91278950752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6324823 (or 6324815 counting only the distinct ones).

The product of its (nonzero) digits is 3175200, while the sum is 55.

The spelling of 91278950752 in words is "ninety-one billion, two hundred seventy-eight million, nine hundred fifty thousand, seven hundred fifty-two".