1091852166157 has 8 divisors (see below), whose sum is σ = 1095211692792. Its totient is φ = 1088495808000.

The previous prime is 1091852166143. The next prime is 1091852166173. The reversal of 1091852166157 is 7516612581901.

It can be written as a sum of positive squares in 4 ways, for example, as 406774808521 + 685077357636 = 637789^2 + 827694^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1091852166157 is a prime.

It is a super-2 number, since 2×1091852166157² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091852166137) 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, 100938 + ... + 1481179.

It is an arithmetic number, because the mean of its divisors is an integer number (136901461599).

Almost surely, 2^{1091852166157} is an apocalyptic number.

It is an amenable number.

1091852166157 is a deficient number, since it is larger than the sum of its proper divisors (3359526635).

1091852166157 is a wasteful number, since it uses less digits than its factorization.

1091852166157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1584239.

The product of its (nonzero) digits is 907200, while the sum is 52.

The spelling of 1091852166157 in words is "one trillion, ninety-one billion, eight hundred fifty-two million, one hundred sixty-six thousand, one hundred fifty-seven".