11601620420 has 192 divisors, whose sum is σ = 28880603136. Its totient is φ = 3874037760.

The previous prime is 11601620399. The next prime is 11601620423. The reversal of 11601620420 is 2402610611.

It is not an unprimeable number, because it can be changed into a prime (11601620423) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 31103354 + ... + 31103726.

It is an arithmetic number, because the mean of its divisors is an integer number (150419808).

Almost surely, 2^11601620420 is an apocalyptic number.

11601620420 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 11601620420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14440301568).

11601620420 is an abundant number, since it is smaller than the sum of its proper divisors (17278982716).

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

11601620420 is a wasteful number, since it uses less digits than its factorization.

11601620420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670 (or 668 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The spelling of 11601620420 in words is "eleven billion, six hundred one million, six hundred twenty thousand, four hundred twenty".