201451633542 has 24 divisors (see below), whose sum is σ = 438435850944. Its totient is φ = 66849419664.

The previous prime is 201451633541. The next prime is 201451633549. The reversal of 201451633542 is 245336154102.

201451633542 is a `hidden beast` number, since 2 + 0 + 1 + 4 + 51 + 63 + 3 + 542 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 201451633497 and 201451633506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201451633541) 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, 25089613 + ... + 25097640.

It is an arithmetic number, because the mean of its divisors is an integer number (18268160456).

Almost surely, 2^201451633542 is an apocalyptic number.

201451633542 is an abundant number, since it is smaller than the sum of its proper divisors (236984217402).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201451633542 is a wasteful number, since it uses less digits than its factorization.

201451633542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50187484 (or 50187481 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

Adding to 201451633542 its reverse (245336154102), we get a palindrome (446787787644).

The spelling of 201451633542 in words is "two hundred one billion, four hundred fifty-one million, six hundred thirty-three thousand, five hundred forty-two".