201872910901788 has 48 divisors (see below), whose sum is σ = 598141958229760. Its totient is φ = 57677974543152.

The previous prime is 201872910901769. The next prime is 201872910901811. The reversal of 201872910901788 is 887109019278102.

201872910901788 is a `hidden beast` number, since 2 + 0 + 187 + 291 + 0 + 90 + 1 + 7 + 88 = 666.

It is a super-2 number, since 2×201872910901788² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

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 15 ways as a sum of consecutive naturals, for example, 133513829206 + ... + 133513830717.

Almost surely, 2^{201872910901788} is an apocalyptic number.

201872910901788 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

201872910901788 is an abundant number, since it is smaller than the sum of its proper divisors (396269047327972).

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

201872910901788 is a wasteful number, since it uses less digits than its factorization.

201872910901788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267027659943 (or 267027659935 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 63.

The spelling of 201872910901788 in words is "two hundred one trillion, eight hundred seventy-two billion, nine hundred ten million, nine hundred one thousand, seven hundred eighty-eight".