1300778381976 has 72 divisors (see below), whose sum is σ = 3432389292180. Its totient is φ = 410738596416.

The previous prime is 1300778381971. The next prime is 1300778381993. The reversal of 1300778381976 is 6791838770031.

It is a super-2 number, since 2×1300778381976² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1300778381971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 106153866 + ... + 106166118.

Almost surely, 2^{1300778381976} 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 1300778381976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1716194646090).

1300778381976 is an abundant number, since it is smaller than the sum of its proper divisors (2131610910204).

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

1300778381976 is an frugal number, since it uses more digits than its factorization.

1300778381976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24553 (or 12277 counting only the distinct ones).

The product of its (nonzero) digits is 10668672, while the sum is 60.

The spelling of 1300778381976 in words is "one trillion, three hundred billion, seven hundred seventy-eight million, three hundred eighty-one thousand, nine hundred seventy-six".