1191245639364 has 243 divisors, whose sum is σ = 3464817708079. Its totient is φ = 344808356640.

The previous prime is 1191245639333. The next prime is 1191245639399. The reversal of 1191245639364 is 4639365421911.

The square root of 1191245639364 is 1091442.

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

1191245639364 is a `hidden beast` number, since 1 + 1 + 9 + 1 + 245 + 6 + 39 + 364 = 666.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1191245639364.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 1656808597 + ... + 1656809315.

Almost surely, 2^{1191245639364} is an apocalyptic number.

1191245639364 is the 1091442-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1191245639364

1191245639364 is an abundant number, since it is smaller than the sum of its proper divisors (2273572068715).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1191245639364 is a wasteful number, since it uses less digits than its factorization.

1191245639364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1516 (or 758 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 54.

It can be divided in two parts, 1191245 and 639364, that added together give a square (1830609 = 1353²).

The spelling of 1191245639364 in words is "one trillion, one hundred ninety-one billion, two hundred forty-five million, six hundred thirty-nine thousand, three hundred sixty-four".