1156426656 has 144 divisors (see below), whose sum is σ = 3852424800. Its totient is φ = 300357120.

The previous prime is 1156426643. The next prime is 1156426673. The reversal of 1156426656 is 6566246511.

It is a super-2 number, since 2×1156426656² = 2674645221414684672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40570 + ... + 62918.

It is an arithmetic number, because the mean of its divisors is an integer number (26752950).

Almost surely, 2^1156426656 is an apocalyptic number.

1156426656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1156426656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1926212400).

1156426656 is an abundant number, since it is smaller than the sum of its proper divisors (2695998144).

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

1156426656 is a wasteful number, since it uses less digits than its factorization.

1156426656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22387 (or 22372 counting only the distinct ones).

The product of its digits is 259200, while the sum is 42.

The square root of 1156426656 is about 34006.2737741141. The cubic root of 1156426656 is about 1049.6375637985.

The spelling of 1156426656 in words is "one billion, one hundred fifty-six million, four hundred twenty-six thousand, six hundred fifty-six".