1978077263136 has 192 divisors, whose sum is σ = 5699498732928. Its totient is φ = 596933296128.

The previous prime is 1978077263089. The next prime is 1978077263219. The reversal of 1978077263136 is 6313627708791.

It is a self number, because there is not a number n which added to its sum of digits gives 1978077263136.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 300753480 + ... + 300760056.

It is an arithmetic number, because the mean of its divisors is an integer number (29684889234).

Almost surely, 2^{1978077263136} is an apocalyptic number.

1978077263136 is a gapful number since it is divisible by the number (16) 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 1978077263136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2849749366464).

1978077263136 is an abundant number, since it is smaller than the sum of its proper divisors (3721421469792).

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

1978077263136 is a wasteful number, since it uses less digits than its factorization.

1978077263136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11203 (or 11195 counting only the distinct ones).

The product of its (nonzero) digits is 16003008, while the sum is 60.

The spelling of 1978077263136 in words is "one trillion, nine hundred seventy-eight billion, seventy-seven million, two hundred sixty-three thousand, one hundred thirty-six".