202640552451 has 12 divisors (see below), whose sum is σ = 292722289600. Its totient is φ = 135084808080.

The previous prime is 202640552431. The next prime is 202640552497. The reversal of 202640552451 is 154255046202.

202640552451 is a `hidden beast` number, since 2 + 0 + 2 + 6 + 405 + 5 + 245 + 1 = 666.

It is not a de Polignac number, because 202640552451 - 2¹¹ = 202640550403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202640552431) 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, 595315 + ... + 871596.

Almost surely, 2^202640552451 is an apocalyptic number.

202640552451 is a deficient number, since it is larger than the sum of its proper divisors (90081737149).

202640552451 is a wasteful number, since it uses less digits than its factorization.

202640552451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1482266 (or 1482263 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 36.

Adding to 202640552451 its reverse (154255046202), we get a palindrome (356895598653).

The spelling of 202640552451 in words is "two hundred two billion, six hundred forty million, five hundred fifty-two thousand, four hundred fifty-one".