1181280307386 has 32 divisors (see below), whose sum is σ = 2378817745920. Its totient is φ = 391057760576.

The previous prime is 1181280307381. The next prime is 1181280307391. The reversal of 1181280307386 is 6837030821811.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1181280307381) and next prime (1181280307391).

It is not an unprimeable number, because it can be changed into a prime (1181280307381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 238746 + ... + 1555493.

It is an arithmetic number, because the mean of its divisors is an integer number (74338054560).

Almost surely, 2^{1181280307386} is an apocalyptic number.

1181280307386 is an abundant number, since it is smaller than the sum of its proper divisors (1197537438534).

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

1181280307386 is a wasteful number, since it uses less digits than its factorization.

1181280307386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1794998.

The product of its (nonzero) digits is 387072, while the sum is 48.

The spelling of 1181280307386 in words is "one trillion, one hundred eighty-one billion, two hundred eighty million, three hundred seven thousand, three hundred eighty-six".