201555622501254 has 240 divisors, whose sum is σ = 545369188116480. Its totient is φ = 55729655205840.

The previous prime is 201555622501199. The next prime is 201555622501307. The reversal of 201555622501254 is 452105226555102.

201555622501254 is a `hidden beast` number, since 2 + 0 + 1 + 5 + 5 + 5 + 622 + 5 + 0 + 12 + 5 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 33387507 + ... + 38959425.

It is an arithmetic number, because the mean of its divisors is an integer number (2272371617152).

Almost surely, 2^{201555622501254} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201555622501254, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272684594058240).

201555622501254 is an abundant number, since it is smaller than the sum of its proper divisors (343813565615226).

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

201555622501254 is an frugal number, since it uses more digits than its factorization.

201555622501254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5571995 (or 5571962 counting only the distinct ones).

The product of its (nonzero) digits is 1200000, while the sum is 45.

The spelling of 201555622501254 in words is "two hundred one trillion, five hundred fifty-five billion, six hundred twenty-two million, five hundred one thousand, two hundred fifty-four".