1019299781864 has 96 divisors (see below), whose sum is σ = 2368025856000. Its totient is φ = 402749957376.

The previous prime is 1019299781839. The next prime is 1019299781867. The reversal of 1019299781864 is 4681879929101.

It is a self number, because there is not a number n which added to its sum of digits gives 1019299781864.

It is not an unprimeable number, because it can be changed into a prime (1019299781867) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7780697 + ... + 7910615.

It is an arithmetic number, because the mean of its divisors is an integer number (24666936000).

Almost surely, 2^{1019299781864} is an apocalyptic number.

1019299781864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1019299781864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1184012928000).

1019299781864 is an abundant number, since it is smaller than the sum of its proper divisors (1348726074136).

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

1019299781864 is a wasteful number, since it uses less digits than its factorization.

1019299781864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130787 (or 130770 counting only the distinct ones).

The product of its (nonzero) digits is 15676416, while the sum is 65.

The spelling of 1019299781864 in words is "one trillion, nineteen billion, two hundred ninety-nine million, seven hundred eighty-one thousand, eight hundred sixty-four".