1181081281951 has 8 divisors (see below), whose sum is σ = 1208567465424. Its totient is φ = 1153595970240.

The previous prime is 1181081281873. The next prime is 1181081281957. The reversal of 1181081281951 is 1591821801811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1181081281951 - 2³⁷ = 1043642328479 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 (1181081281957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3106395 + ... + 3465811.

It is an arithmetic number, because the mean of its divisors is an integer number (151070933178).

Almost surely, 2^{1181081281951} is an apocalyptic number.

1181081281951 is a deficient number, since it is larger than the sum of its proper divisors (27486183473).

1181081281951 is an equidigital number, since it uses as much as digits as its factorization.

1181081281951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435881.

The product of its (nonzero) digits is 46080, while the sum is 46.

The spelling of 1181081281951 in words is "one trillion, one hundred eighty-one billion, eighty-one million, two hundred eighty-one thousand, nine hundred fifty-one".