11655623533620 has 432 divisors, whose sum is σ = 37768616794944. Its totient is φ = 2682089625600.

The previous prime is 11655623533531. The next prime is 11655623533643. The reversal of 11655623533620 is 2633532655611.

It is a self number, because there is not a number n which added to its sum of digits gives 11655623533620.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 407482239 + ... + 407510841.

It is an arithmetic number, because the mean of its divisors is an integer number (87427353692).

Almost surely, 2^{11655623533620} is an apocalyptic number.

11655623533620 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 11655623533620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18884308397472).

11655623533620 is an abundant number, since it is smaller than the sum of its proper divisors (26112993261324).

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

11655623533620 is a wasteful number, since it uses less digits than its factorization.

11655623533620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28752 (or 28702 counting only the distinct ones).

The product of its (nonzero) digits is 2916000, while the sum is 48.

The spelling of 11655623533620 in words is "eleven trillion, six hundred fifty-five billion, six hundred twenty-three million, five hundred thirty-three thousand, six hundred twenty".