1190809102564 has 9 divisors (see below), whose sum is σ = 2083919748841. Its totient is φ = 595403460040.

The previous prime is 1190809102559. The next prime is 1190809102577. The reversal of 1190809102564 is 4652019080911.

It is a happy number.

The square root of 1190809102564 is 1091242.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 496120192164 + 694688910400 = 704358^2 + 833480^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1909674 + ... + 2455294.

Almost surely, 2^{1190809102564} is an apocalyptic number.

1190809102564 is the 1091242-nd square number.

It is an amenable number.

1190809102564 is a deficient number, since it is larger than the sum of its proper divisors (893110646277).

1190809102564 is an frugal number, since it uses more digits than its factorization.

1190809102564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1091246 (or 545623 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 46.

The spelling of 1190809102564 in words is "one trillion, one hundred ninety billion, eight hundred nine million, one hundred two thousand, five hundred sixty-four".