1240685558136 has 80 divisors (see below), whose sum is σ = 3477898135800. Its totient is φ = 413225084736.

The previous prime is 1240685557997. The next prime is 1240685558137. The reversal of 1240685558136 is 6318555860421.

1240685558136 is a `hidden beast` number, since 1 + 2 + 4 + 0 + 6 + 8 + 55 + 581 + 3 + 6 = 666.

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 (1240685558137) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 17451 + ... + 1575333.

Almost surely, 2^{1240685558136} 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 1240685558136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1738949067900).

1240685558136 is an abundant number, since it is smaller than the sum of its proper divisors (2237212577664).

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

1240685558136 is a wasteful number, since it uses less digits than its factorization.

1240685558136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1559130 (or 1559117 counting only the distinct ones).

The product of its (nonzero) digits is 6912000, while the sum is 54.

The spelling of 1240685558136 in words is "one trillion, two hundred forty billion, six hundred eighty-five million, five hundred fifty-eight thousand, one hundred thirty-six".