201542655405 has 64 divisors (see below), whose sum is σ = 396961302528. Its totient is φ = 85030007040.

The previous prime is 201542655343. The next prime is 201542655421. The reversal of 201542655405 is 504556245102.

It is not a de Polignac number, because 201542655405 - 2¹⁵ = 201542622637 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9122182 + ... + 9144248.

It is an arithmetic number, because the mean of its divisors is an integer number (6202520352).

Almost surely, 2^201542655405 is an apocalyptic number.

It is an amenable number.

201542655405 is a deficient number, since it is larger than the sum of its proper divisors (195418647123).

201542655405 is a wasteful number, since it uses less digits than its factorization.

201542655405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28786.

The product of its (nonzero) digits is 240000, while the sum is 39.

The spelling of 201542655405 in words is "two hundred one billion, five hundred forty-two million, six hundred fifty-five thousand, four hundred five".