1156049680 has 80 divisors (see below), whose sum is σ = 2836872000. Its totient is φ = 436907520.

The previous prime is 1156049669. The next prime is 1156049683. The reversal of 1156049680 is 869406511.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (1156049683) 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, 745546 + ... + 747094.

It is an arithmetic number, because the mean of its divisors is an integer number (35460900).

Almost surely, 2^1156049680 is an apocalyptic number.

1156049680 is a gapful number since it is divisible by the number (10) 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 1156049680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1418436000).

1156049680 is an abundant number, since it is smaller than the sum of its proper divisors (1680822320).

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

1156049680 is a wasteful number, since it uses less digits than its factorization.

1156049680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2072 (or 2066 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 1156049680 is about 34000.7305803861. The cubic root of 1156049680 is about 1049.5234965634.

The spelling of 1156049680 in words is "one billion, one hundred fifty-six million, forty-nine thousand, six hundred eighty".