1164544781398 has 32 divisors (see below), whose sum is σ = 1779215134464. Its totient is φ = 571537398432.

The previous prime is 1164544781369. The next prime is 1164544781431. The reversal of 1164544781398 is 8931874454611.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74993511 + ... + 75009037.

It is an arithmetic number, because the mean of its divisors is an integer number (55600472952).

Almost surely, 2^{1164544781398} is an apocalyptic number.

1164544781398 is a deficient number, since it is larger than the sum of its proper divisors (614670353066).

1164544781398 is a wasteful number, since it uses less digits than its factorization.

1164544781398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17556.

The product of its digits is 23224320, while the sum is 61.

The spelling of 1164544781398 in words is "one trillion, one hundred sixty-four billion, five hundred forty-four million, seven hundred eighty-one thousand, three hundred ninety-eight".