11621385755420 has 96 divisors (see below), whose sum is σ = 29278268909568. Its totient is φ = 3788415113472.

The previous prime is 11621385755347. The next prime is 11621385755429. The reversal of 11621385755420 is 2455758312611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11621385755429) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10268027 + ... + 11343506.

It is an arithmetic number, because the mean of its divisors is an integer number (304981967808).

Almost surely, 2^{11621385755420} is an apocalyptic number.

11621385755420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11621385755420 is an abundant number, since it is smaller than the sum of its proper divisors (17656883154148).

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

11621385755420 is a wasteful number, since it uses less digits than its factorization.

11621385755420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21611739 (or 21611737 counting only the distinct ones).

The product of its (nonzero) digits is 2016000, while the sum is 50.

The spelling of 11621385755420 in words is "eleven trillion, six hundred twenty-one billion, three hundred eighty-five million, seven hundred fifty-five thousand, four hundred twenty".