1129438281690 has 160 divisors (see below), whose sum is σ = 3077996993280. Its totient is φ = 297117714816.

The previous prime is 1129438281679. The next prime is 1129438281701. The reversal of 1129438281690 is 961828349211.

It is a happy number.

1129438281690 is a `hidden beast` number, since 1 + 1 + 29 + 438 + 28 + 169 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1129438281679) and next prime (1129438281701).

It is a super-2 number, since 2×1129438281690² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 82092292 + ... + 82106048.

It is an arithmetic number, because the mean of its divisors is an integer number (19237481208).

Almost surely, 2^{1129438281690} is an apocalyptic number.

1129438281690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1129438281690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1538998496640).

1129438281690 is an abundant number, since it is smaller than the sum of its proper divisors (1948558711590).

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

1129438281690 is a wasteful number, since it uses less digits than its factorization.

1129438281690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15138 (or 15129 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 54.

The spelling of 1129438281690 in words is "one trillion, one hundred twenty-nine billion, four hundred thirty-eight million, two hundred eighty-one thousand, six hundred ninety".