1156353605 has 16 divisors (see below), whose sum is σ = 1517315328. Its totient is φ = 839016000.

The previous prime is 1156353581. The next prime is 1156353613. The reversal of 1156353605 is 5063536511.

It is a happy number.

It is not a de Polignac number, because 1156353605 - 2²⁸ = 887918149 is a prime.

It is a Duffinian 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, 686 + ... + 48095.

It is an arithmetic number, because the mean of its divisors is an integer number (94832208).

Almost surely, 2^1156353605 is an apocalyptic number.

It is an amenable number.

1156353605 is a deficient number, since it is larger than the sum of its proper divisors (360961723).

1156353605 is a wasteful number, since it uses less digits than its factorization.

1156353605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49228.

The product of its (nonzero) digits is 40500, while the sum is 35.

The square root of 1156353605 is about 34005.1996759319. The cubic root of 1156353605 is about 1049.6154616076.

It can be divided in two parts, 11 and 56353605, that multiplied together give a triangular number (619889655 = T₃₅₂₁₀).

The spelling of 1156353605 in words is "one billion, one hundred fifty-six million, three hundred fifty-three thousand, six hundred five".