201011999958 has 144 divisors (see below), whose sum is σ = 547540051968. Its totient is φ = 52169594400.

The previous prime is 201011999899. The next prime is 201011999983. The reversal of 201011999958 is 859999110102.

It is a super-2 number, since 2×201011999958² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 22422385 + ... + 22431347.

It is an arithmetic number, because the mean of its divisors is an integer number (3802361472).

Almost surely, 2^201011999958 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201011999958, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273770025984).

201011999958 is an abundant number, since it is smaller than the sum of its proper divisors (346528052010).

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

201011999958 is a wasteful number, since it uses less digits than its factorization.

201011999958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10471 (or 10457 counting only the distinct ones).

The product of its (nonzero) digits is 524880, while the sum is 54.

The spelling of 201011999958 in words is "two hundred one billion, eleven million, nine hundred ninety-nine thousand, nine hundred fifty-eight".