1161951266599 has 8 divisors (see below), whose sum is σ = 1238588960000. Its totient is φ = 1086861809592.

The previous prime is 1161951266579. The next prime is 1161951266603. The reversal of 1161951266599 is 9956621591611.

It is a happy number.

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 1161951266599 - 2⁹ = 1161951266087 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 (1161951266549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 387057549 + ... + 387060550.

It is an arithmetic number, because the mean of its divisors is an integer number (154823620000).

Almost surely, 2^{1161951266599} is an apocalyptic number.

1161951266599 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1161951266599 is a deficient number, since it is larger than the sum of its proper divisors (76637693401).

1161951266599 is an equidigital number, since it uses as much as digits as its factorization.

1161951266599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774118197.

The product of its digits is 7873200, while the sum is 61.

The spelling of 1161951266599 in words is "one trillion, one hundred sixty-one billion, nine hundred fifty-one million, two hundred sixty-six thousand, five hundred ninety-nine".