201478717440 has 2160 divisors, whose sum is σ = 984362621760. Its totient is φ = 38645268480.

The previous prime is 201478717423. The next prime is 201478717499. The reversal of 201478717440 is 44717874102.

201478717440 is a `hidden beast` number, since 2 + 0 + 1 + 478 + 7 + 174 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (2160).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 15498362874 + ... + 15498362886.

It is an arithmetic number, because the mean of its divisors is an integer number (455723436).

Almost surely, 2^201478717440 is an apocalyptic number.

201478717440 is a gapful number since it is divisible by the number (20) 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 201478717440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (492181310880).

201478717440 is an abundant number, since it is smaller than the sum of its proper divisors (782883904320).

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

201478717440 is a wasteful number, since it uses less digits than its factorization.

201478717440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93 (or 41 counting only the distinct ones).

The product of its (nonzero) digits is 351232, while the sum is 45.

The spelling of 201478717440 in words is "two hundred one billion, four hundred seventy-eight million, seven hundred seventeen thousand, four hundred forty".