91642024646 has 4 divisors (see below), whose sum is σ = 137463036972. Its totient is φ = 45821012322.

The previous prime is 91642024631. The next prime is 91642024717. The reversal of 91642024646 is 64642024619.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 91642024597 and 91642024606.

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 as a sum of consecutive naturals, namely, 22910506160 + ... + 22910506163.

It is an arithmetic number, because the mean of its divisors is an integer number (34365759243).

Almost surely, 2^91642024646 is an apocalyptic number.

91642024646 is a deficient number, since it is larger than the sum of its proper divisors (45821012326).

91642024646 is a wasteful number, since it uses less digits than its factorization.

91642024646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45821012325.

The product of its (nonzero) digits is 497664, while the sum is 44.

The spelling of 91642024646 in words is "ninety-one billion, six hundred forty-two million, twenty-four thousand, six hundred forty-six".