11621520040660 has 24 divisors (see below), whose sum is σ = 24546262567176. Its totient is φ = 4621737448320.

The previous prime is 11621520040649. The next prime is 11621520040661. The reversal of 11621520040660 is 6604002512611.

It can be written as a sum of positive squares in 4 ways, for example, as 1321759503684 + 10299760536976 = 1149678^2 + 3209324^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11621520040661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1679406951 + ... + 1679413870.

It is an arithmetic number, because the mean of its divisors is an integer number (1022760940299).

Almost surely, 2^{11621520040660} is an apocalyptic number.

11621520040660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11621520040660 is an abundant number, since it is smaller than the sum of its proper divisors (12924742526516).

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

11621520040660 is a wasteful number, since it uses less digits than its factorization.

11621520040660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3358821003 (or 3358821001 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The spelling of 11621520040660 in words is "eleven trillion, six hundred twenty-one billion, five hundred twenty million, forty thousand, six hundred sixty".