201388950690 has 64 divisors (see below), whose sum is σ = 486617773824. Its totient is φ = 53339090688.

The previous prime is 201388950689. The next prime is 201388950691. The reversal of 201388950690 is 96059883102.

It is a happy number.

201388950690 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (201388950689) and next prime (201388950691).

It is a super-2 number, since 2×201388950690² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (201388950691) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13166227 + ... + 13181513.

It is an arithmetic number, because the mean of its divisors is an integer number (7603402716).

Almost surely, 2^201388950690 is an apocalyptic number.

201388950690 is an abundant number, since it is smaller than the sum of its proper divisors (285228823134).

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

201388950690 is a wasteful number, since it uses less digits than its factorization.

201388950690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18251.

The product of its (nonzero) digits is 933120, while the sum is 51.

The spelling of 201388950690 in words is "two hundred one billion, three hundred eighty-eight million, nine hundred fifty thousand, six hundred ninety".