201165772438 has 4 divisors (see below), whose sum is σ = 301748658660. Its totient is φ = 100582886218.

The previous prime is 201165772429. The next prime is 201165772463. The reversal of 201165772438 is 834277561102.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50291443108 + ... + 50291443111.

It is an arithmetic number, because the mean of its divisors is an integer number (75437164665).

Almost surely, 2^201165772438 is an apocalyptic number.

201165772438 is a deficient number, since it is larger than the sum of its proper divisors (100582886222).

201165772438 is a wasteful number, since it uses less digits than its factorization.

201165772438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100582886221.

The product of its (nonzero) digits is 564480, while the sum is 46.

The spelling of 201165772438 in words is "two hundred one billion, one hundred sixty-five million, seven hundred seventy-two thousand, four hundred thirty-eight".