91104940502 has 4 divisors (see below), whose sum is σ = 136657410756.
Its totient is φ = 45552470250.
The previous prime is 91104940501. The next prime is 91104940571. The reversal of 91104940502 is 20504940119.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20504940119 = 677 ⋅30287947.
It is a super-3 number, since 3×911049405023 (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (91104940501) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22776235124 + ... + 22776235127.
It is an arithmetic number, because the mean of its divisors is an integer number (34164352689).
Almost surely, 291104940502 is an apocalyptic number.
91104940502 is a deficient number, since it is larger than the sum of its proper divisors (45552470254).
91104940502 is a wasteful number, since it uses less digits than its factorization.
91104940502 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 45552470253.
The product of its (nonzero) digits is 12960, while the sum is 35.
The spelling of 91104940502 in words is "ninety-one billion, one hundred four million, nine hundred forty thousand, five hundred two".