163620201554 has 8 divisors (see below), whose sum is σ = 245441677068. Its totient is φ = 81806309200.

The previous prime is 163620201553. The next prime is 163620201557. The reversal of 163620201554 is 455102026361.

It can be written as a sum of positive squares in 2 ways, for example, as 152080500625 + 11539700929 = 389975^2 + 107423^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (163620201553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1841537 + ... + 1928340.

Almost surely, 2^163620201554 is an apocalyptic number.

163620201554 is a deficient number, since it is larger than the sum of its proper divisors (81821475514).

163620201554 is a wasteful number, since it uses less digits than its factorization.

163620201554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3791580.

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 163620201554 in words is "one hundred sixty-three billion, six hundred twenty million, two hundred one thousand, five hundred fifty-four".