999995100780 has 192 divisors, whose sum is σ = 3147394618368. Its totient is φ = 235381386240.

The previous prime is 999995100779. The next prime is 999995100781. The reversal of 999995100780 is 87001599999.

999995100780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (999995100779) and next prime (999995100781).

It is not an unprimeable number, because it can be changed into a prime (999995100781) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 87200607 + ... + 87212073.

It is an arithmetic number, because the mean of its divisors is an integer number (16392680304).

Almost surely, 2^999995100780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 999995100780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1573697309184).

999995100780 is an abundant number, since it is smaller than the sum of its proper divisors (2147399517588).

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

999995100780 is a wasteful number, since it uses less digits than its factorization.

999995100780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16376 (or 16374 counting only the distinct ones).

The product of its (nonzero) digits is 16533720, while the sum is 66.

The spelling of 999995100780 in words is "nine hundred ninety-nine billion, nine hundred ninety-five million, one hundred thousand, seven hundred eighty".