1103555136420 has 384 divisors, whose sum is σ = 3842508257280. Its totient is φ = 260624770560.

The previous prime is 1103555136413. The next prime is 1103555136457. The reversal of 1103555136420 is 246315553011.

1103555136420 is a `hidden beast` number, since 1 + 1 + 0 + 3 + 5 + 5 + 5 + 1 + 3 + 642 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 101396299 + ... + 101407181.

It is an arithmetic number, because the mean of its divisors is an integer number (10006531920).

Almost surely, 2^{1103555136420} is an apocalyptic number.

1103555136420 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 1103555136420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1921254128640).

1103555136420 is an abundant number, since it is smaller than the sum of its proper divisors (2738953120860).

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

1103555136420 is a wasteful number, since it uses less digits than its factorization.

1103555136420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11352 (or 11344 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The spelling of 1103555136420 in words is "one trillion, one hundred three billion, five hundred fifty-five million, one hundred thirty-six thousand, four hundred twenty".