1191851952027 has 16 divisors (see below), whose sum is σ = 1734680357760. Its totient is φ = 721885550400.

The previous prime is 1191851951813. The next prime is 1191851952043. The reversal of 1191851952027 is 7202591581911.

It is not a de Polignac number, because 1191851952027 - 2²⁷ = 1191717734299 is a prime.

It is a super-2 number, since 2×1191851952027² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1191851952097) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11170249 + ... + 11276442.

It is an arithmetic number, because the mean of its divisors is an integer number (108417522360).

Almost surely, 2^{1191851952027} is an apocalyptic number.

1191851952027 is a deficient number, since it is larger than the sum of its proper divisors (542828405733).

1191851952027 is a wasteful number, since it uses less digits than its factorization.

1191851952027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22448314.

The product of its (nonzero) digits is 453600, while the sum is 51.

The spelling of 1191851952027 in words is "one trillion, one hundred ninety-one billion, eight hundred fifty-one million, nine hundred fifty-two thousand, twenty-seven".