991096307070 has 32 divisors (see below), whose sum is σ = 2503822250880. Its totient is φ = 250382224800.

The previous prime is 991096307057. The next prime is 991096307099. The reversal of 991096307070 is 70703690199.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 869382156 + ... + 869383295.

It is an arithmetic number, because the mean of its divisors is an integer number (78244445340).

Almost surely, 2^991096307070 is an apocalyptic number.

991096307070 is an abundant number, since it is smaller than the sum of its proper divisors (1512725943810).

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

991096307070 is a wasteful number, since it uses less digits than its factorization.

991096307070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1738765480.

The product of its (nonzero) digits is 642978, while the sum is 51.

The spelling of 991096307070 in words is "nine hundred ninety-one billion, ninety-six million, three hundred seven thousand, seventy".