1091064428247 has 8 divisors (see below), whose sum is σ = 1454765071744. Its totient is φ = 727370035128.

The previous prime is 1091064428239. The next prime is 1091064428263. The reversal of 1091064428247 is 7428244601901.

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

It is not a de Polignac number, because 1091064428247 - 2³ = 1091064428239 is a prime.

It is a super-2 number, since 2×1091064428247² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1091064428196 and 1091064428205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091064421247) 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, 1138873 + ... + 1865250.

It is an arithmetic number, because the mean of its divisors is an integer number (181845633968).

Almost surely, 2^{1091064428247} is an apocalyptic number.

1091064428247 is a deficient number, since it is larger than the sum of its proper divisors (363700643497).

1091064428247 is a wasteful number, since it uses less digits than its factorization.

1091064428247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3125189.

The product of its (nonzero) digits is 774144, while the sum is 48.

The spelling of 1091064428247 in words is "one trillion, ninety-one billion, sixty-four million, four hundred twenty-eight thousand, two hundred forty-seven".