91001649346 has 4 divisors (see below), whose sum is σ = 136502474022. Its totient is φ = 45500824672.

The previous prime is 91001649293. The next prime is 91001649359. The reversal of 91001649346 is 64394610019.

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

It can be written as a sum of positive squares in only one way, i.e., 90986086321 + 15563025 = 301639^2 + 3945^2 .

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, 22750412335 + ... + 22750412338.

Almost surely, 2^91001649346 is an apocalyptic number.

91001649346 is a deficient number, since it is larger than the sum of its proper divisors (45500824676).

91001649346 is a wasteful number, since it uses less digits than its factorization.

91001649346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45500824675.

The product of its (nonzero) digits is 139968, while the sum is 43.

The spelling of 91001649346 in words is "ninety-one billion, one million, six hundred forty-nine thousand, three hundred forty-six".