202940497917 has 12 divisors (see below), whose sum is σ = 293300152860. Its totient is φ = 135218029248.

The previous prime is 202940497901. The next prime is 202940497927. The reversal of 202940497917 is 719794049202.

202940497917 is a `hidden beast` number, since 2 + 0 + 29 + 40 + 497 + 91 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 195652290276 + 7288207641 = 442326^2 + 85371^2 .

It is not a de Polignac number, because 202940497917 - 2⁴ = 202940497901 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202940497927) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6286008 + ... + 6318209.

It is an arithmetic number, because the mean of its divisors is an integer number (24441679405).

Almost surely, 2^202940497917 is an apocalyptic number.

It is an amenable number.

202940497917 is a deficient number, since it is larger than the sum of its proper divisors (90359654943).

202940497917 is a wasteful number, since it uses less digits than its factorization.

202940497917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12606012 (or 12606009 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 54.

The spelling of 202940497917 in words is "two hundred two billion, nine hundred forty million, four hundred ninety-seven thousand, nine hundred seventeen".