201550106640 has 40 divisors (see below), whose sum is σ = 624805331328. Its totient is φ = 53746695040.

The previous prime is 201550106617. The next prime is 201550106657. The reversal of 201550106640 is 46601055102.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 201550106598 and 201550106607.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 419895816 + ... + 419896295.

Almost surely, 2^201550106640 is an apocalyptic number.

201550106640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201550106640 is an abundant number, since it is smaller than the sum of its proper divisors (423255224688).

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

201550106640 is a wasteful number, since it uses less digits than its factorization.

201550106640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839792127 (or 839792121 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The spelling of 201550106640 in words is "two hundred one billion, five hundred fifty million, one hundred six thousand, six hundred forty".