201309694261 has 16 divisors (see below), whose sum is σ = 218869678720. Its totient is φ = 184047422400.

The previous prime is 201309694241. The next prime is 201309694309. The reversal of 201309694261 is 162496903102.

It is a cyclic number.

It is not a de Polignac number, because 201309694261 - 2¹³ = 201309686069 is a prime.

It is a super-2 number, since 2×201309694261² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201309694241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3775336 + ... + 3828286.

It is an arithmetic number, because the mean of its divisors is an integer number (13679354920).

Almost surely, 2^201309694261 is an apocalyptic number.

It is an amenable number.

201309694261 is a deficient number, since it is larger than the sum of its proper divisors (17559984459).

201309694261 is a wasteful number, since it uses less digits than its factorization.

201309694261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55756.

The product of its (nonzero) digits is 139968, while the sum is 43.

The spelling of 201309694261 in words is "two hundred one billion, three hundred nine million, six hundred ninety-four thousand, two hundred sixty-one".