91874676646 has 8 divisors (see below), whose sum is σ = 137814585480. Its totient is φ = 45936481488.

The previous prime is 91874676629. The next prime is 91874676697. The reversal of 91874676646 is 64667647819.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 284751 + ... + 514618.

It is an arithmetic number, because the mean of its divisors is an integer number (17226823185).

Almost surely, 2^91874676646 is an apocalyptic number.

91874676646 is a deficient number, since it is larger than the sum of its proper divisors (45939908834).

91874676646 is a wasteful number, since it uses less digits than its factorization.

91874676646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856838.

The product of its digits is 73156608, while the sum is 64.

The spelling of 91874676646 in words is "ninety-one billion, eight hundred seventy-four million, six hundred seventy-six thousand, six hundred forty-six".