1197776437780 has 48 divisors (see below), whose sum is σ = 2723783431824. Its totient is φ = 439812495360.

The previous prime is 1197776437771. The next prime is 1197776437799. The reversal of 1197776437780 is 877346777911.

It can be written as a sum of positive squares in 8 ways, for example, as 620811623056 + 576964814724 = 787916^2 + 759582^2 .

It is a super-2 number, since 2×1197776437780² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12678997 + ... + 12773116.

It is an arithmetic number, because the mean of its divisors is an integer number (56745488163).

Almost surely, 2^{1197776437780} is an apocalyptic number.

1197776437780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1197776437780 is an abundant number, since it is smaller than the sum of its proper divisors (1526006994044).

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

1197776437780 is a wasteful number, since it uses less digits than its factorization.

1197776437780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25452316 (or 25452314 counting only the distinct ones).

The product of its (nonzero) digits is 87127488, while the sum is 67.

The spelling of 1197776437780 in words is "one trillion, one hundred ninety-seven billion, seven hundred seventy-six million, four hundred thirty-seven thousand, seven hundred eighty".