869388061140 has 120 divisors (see below), whose sum is σ = 2821347615240. Its totient is φ = 223842431232.

The previous prime is 869388061127. The next prime is 869388061141. The reversal of 869388061140 is 41160883968.

869388061140 is a `hidden beast` number, since 8 + 69 + 388 + 0 + 61 + 140 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 56599264836 + 812788796304 = 237906^2 + 901548^2 .

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 (869388061141) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 9205767 + ... + 9299726.

It is an arithmetic number, because the mean of its divisors is an integer number (23511230127).

Almost surely, 2^869388061140 is an apocalyptic number.

It is an amenable number.

869388061140 is an abundant number, since it is smaller than the sum of its proper divisors (1951959554100).

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

869388061140 is a wasteful number, since it uses less digits than its factorization.

869388061140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18505543 (or 18505532 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 54.

It can be divided in two parts, 8693880 and 61140, that added together give a triangular number (8755020 = T₄₁₈₄).

The spelling of 869388061140 in words is "eight hundred sixty-nine billion, three hundred eighty-eight million, sixty-one thousand, one hundred forty".