1091859374801 has 16 divisors (see below), whose sum is σ = 1233058036560. Its totient is φ = 959785666560.

The previous prime is 1091859374779. The next prime is 1091859374839. The reversal of 1091859374801 is 1084739581901.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 47099416576 + 1044759958225 = 217024^2 + 1022135^2 .

It is a cyclic number.

It is not a de Polignac number, because 1091859374801 - 2¹⁴ = 1091859358417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1091859377801) 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, 19809320 + ... + 19864361.

It is an arithmetic number, because the mean of its divisors is an integer number (77066127285).

Almost surely, 2^{1091859374801} is an apocalyptic number.

It is an amenable number.

1091859374801 is a deficient number, since it is larger than the sum of its proper divisors (141198661759).

1091859374801 is a wasteful number, since it uses less digits than its factorization.

1091859374801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39673796.

The product of its (nonzero) digits is 2177280, while the sum is 56.

The spelling of 1091859374801 in words is "one trillion, ninety-one billion, eight hundred fifty-nine million, three hundred seventy-four thousand, eight hundred one".