201615010643 has 4 divisors (see below), whose sum is σ = 202628151600. Its totient is φ = 200601869688.

The previous prime is 201615010637. The next prime is 201615010693. The reversal of 201615010643 is 346010516102.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 201615010643 - 2¹⁶ = 201614945107 is a prime.

It is a super-2 number, since 2×201615010643² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201615010693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 506570180 + ... + 506570577.

It is an arithmetic number, because the mean of its divisors is an integer number (50657037900).

Almost surely, 2^201615010643 is an apocalyptic number.

201615010643 is a deficient number, since it is larger than the sum of its proper divisors (1013140957).

201615010643 is a wasteful number, since it uses less digits than its factorization.

201615010643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1013140956.

The product of its (nonzero) digits is 4320, while the sum is 29.

Adding to 201615010643 its reverse (346010516102), we get a palindrome (547625526745).

The spelling of 201615010643 in words is "two hundred one billion, six hundred fifteen million, ten thousand, six hundred forty-three".