1161555436 has 6 divisors (see below), whose sum is σ = 2032722020. Its totient is φ = 580777716.

The previous prime is 1161555427. The next prime is 1161555463. The reversal of 1161555436 is 6345551611.

It is a super-2 number, since 2×1161555436² = 2698422061802300192, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1161555395 and 1161555404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145194426 + ... + 145194433.

Almost surely, 2^1161555436 is an apocalyptic number.

It is an amenable number.

1161555436 is a deficient number, since it is larger than the sum of its proper divisors (871166584).

1161555436 is a wasteful number, since it uses less digits than its factorization.

1161555436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290388863 (or 290388861 counting only the distinct ones).

The product of its digits is 54000, while the sum is 37.

The square root of 1161555436 is about 34081.5996690296. The cubic root of 1161555436 is about 1051.1869980619.

The spelling of 1161555436 in words is "one billion, one hundred sixty-one million, five hundred fifty-five thousand, four hundred thirty-six".