990965711862 has 144 divisors (see below), whose sum is σ = 2635386062400. Its totient is φ = 267589254240.

The previous prime is 990965711839. The next prime is 990965711863. The reversal of 990965711862 is 268117569099.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 990965711862.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990965711863) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 6951037 + ... + 7092167.

It is an arithmetic number, because the mean of its divisors is an integer number (18301292100).

Almost surely, 2^990965711862 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 990965711862, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1317693031200).

990965711862 is an abundant number, since it is smaller than the sum of its proper divisors (1644420350538).

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

990965711862 is a wasteful number, since it uses less digits than its factorization.

990965711862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141591 (or 141581 counting only the distinct ones).

The product of its (nonzero) digits is 14696640, while the sum is 63.

The spelling of 990965711862 in words is "nine hundred ninety billion, nine hundred sixty-five million, seven hundred eleven thousand, eight hundred sixty-two".