1181555400967 has 4 divisors (see below), whose sum is σ = 1184902583760. Its totient is φ = 1178208218176.

The previous prime is 1181555400953. The next prime is 1181555400979. The reversal of 1181555400967 is 7690045551811.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1181555400967 - 2¹⁵ = 1181555368199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1181555400917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1673590867 + ... + 1673591572.

It is an arithmetic number, because the mean of its divisors is an integer number (296225645940).

Almost surely, 2^{1181555400967} is an apocalyptic number.

1181555400967 is a deficient number, since it is larger than the sum of its proper divisors (3347182793).

1181555400967 is an equidigital number, since it uses as much as digits as its factorization.

1181555400967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3347182792.

The product of its (nonzero) digits is 1512000, while the sum is 52.

The spelling of 1181555400967 in words is "one trillion, one hundred eighty-one billion, five hundred fifty-five million, four hundred thousand, nine hundred sixty-seven".