69840845136 has 150 divisors (see below), whose sum is σ = 214730833790. Its totient is φ = 21910735872.

The previous prime is 69840845131. The next prime is 69840845141. The reversal of 69840845136 is 63154804896.

69840845136 is a `hidden beast` number, since 6 + 9 + 8 + 40 + 84 + 513 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (69840845131) and next prime (69840845141).

It can be written as a sum of positive squares in 3 ways, for example, as 10861808400 + 58979036736 = 104220^2 + 242856^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69840845131) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 281310 + ... + 467778.

Almost surely, 2^69840845136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 69840845136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107365416895).

69840845136 is an abundant number, since it is smaller than the sum of its proper divisors (144889988654).

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

69840845136 is a wasteful number, since it uses less digits than its factorization.

69840845136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186523 (or 186491 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 54.

The spelling of 69840845136 in words is "sixty-nine billion, eight hundred forty million, eight hundred forty-five thousand, one hundred thirty-six".