115551521553420 has 384 divisors, whose sum is σ = 372798326880000. Its totient is φ = 29678600060928.

The previous prime is 115551521553409. The next prime is 115551521553439. The reversal of 115551521553420 is 24355125155511.

115551521553420 is a `hidden beast` number, since 1 + 1 + 5 + 5 + 5 + 1 + 5 + 215 + 5 + 3 + 420 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 17698192716 + ... + 17698199244.

It is an arithmetic number, because the mean of its divisors is an integer number (970828976250).

Almost surely, 2^{115551521553420} is an apocalyptic number.

115551521553420 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 115551521553420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186399163440000).

115551521553420 is an abundant number, since it is smaller than the sum of its proper divisors (257246805326580).

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

115551521553420 is a wasteful number, since it uses less digits than its factorization.

115551521553420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9162 (or 9154 counting only the distinct ones).

The product of its (nonzero) digits is 750000, while the sum is 45.

The spelling of 115551521553420 in words is "one hundred fifteen trillion, five hundred fifty-one billion, five hundred twenty-one million, five hundred fifty-three thousand, four hundred twenty".