1156423646 has 32 divisors (see below), whose sum is σ = 2023587840. Its totient is φ = 485424576.

The previous prime is 1156423607. The next prime is 1156423649. The reversal of 1156423646 is 6463246511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156423649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136346 + ... + 144578.

It is an arithmetic number, because the mean of its divisors is an integer number (63237120).

Almost surely, 2^1156423646 is an apocalyptic number.

1156423646 is a deficient number, since it is larger than the sum of its proper divisors (867164194).

1156423646 is a wasteful number, since it uses less digits than its factorization.

1156423646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8448.

The product of its digits is 103680, while the sum is 38.

The square root of 1156423646 is about 34006.2295175458. The cubic root of 1156423646 is about 1049.6366531162.

The spelling of 1156423646 in words is "one billion, one hundred fifty-six million, four hundred twenty-three thousand, six hundred forty-six".