991297920062 has 16 divisors (see below), whose sum is σ = 1496374516800. Its totient is φ = 492514920480.

The previous prime is 991297920061. The next prime is 991297920077. The reversal of 991297920062 is 260029792199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (991297920061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1893014 + ... + 2359257.

It is an arithmetic number, because the mean of its divisors is an integer number (93523407300).

Almost surely, 2^991297920062 is an apocalyptic number.

991297920062 is a deficient number, since it is larger than the sum of its proper divisors (505076596738).

991297920062 is a wasteful number, since it uses less digits than its factorization.

991297920062 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4253011.

The product of its (nonzero) digits is 2204496, while the sum is 56.

The spelling of 991297920062 in words is "nine hundred ninety-one billion, two hundred ninety-seven million, nine hundred twenty thousand, sixty-two".