201620741904 has 120 divisors (see below), whose sum is σ = 593285074200. Its totient is φ = 63825592320.

The previous prime is 201620741887. The next prime is 201620741951. The reversal of 201620741904 is 409147026102.

It is a happy number.

201620741904 is a `hidden beast` number, since 20 + 1 + 620 + 7 + 4 + 1 + 9 + 0 + 4 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 13282101504 + 188338640400 = 115248^2 + 433980^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 141009 + ... + 650480.

It is an arithmetic number, because the mean of its divisors is an integer number (4944042285).

Almost surely, 2^201620741904 is an apocalyptic number.

201620741904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

201620741904 is an abundant number, since it is smaller than the sum of its proper divisors (391664332296).

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

201620741904 is a wasteful number, since it uses less digits than its factorization.

201620741904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791593 (or 791584 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The spelling of 201620741904 in words is "two hundred one billion, six hundred twenty million, seven hundred forty-one thousand, nine hundred four".