133451723653 has 4 divisors (see below), whose sum is σ = 134270446048. Its totient is φ = 132633001260.

The previous prime is 133451723627. The next prime is 133451723659. The reversal of 133451723653 is 356327154331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 133451723653 - 2¹³ = 133451715461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133451723659) 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, 409360953 + ... + 409361278.

It is an arithmetic number, because the mean of its divisors is an integer number (33567611512).

Almost surely, 2^133451723653 is an apocalyptic number.

It is an amenable number.

133451723653 is a deficient number, since it is larger than the sum of its proper divisors (818722395).

133451723653 is an equidigital number, since it uses as much as digits as its factorization.

133451723653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818722394.

The product of its digits is 680400, while the sum is 43.

Adding to 133451723653 its reverse (356327154331), we get a palindrome (489778877984).

The spelling of 133451723653 in words is "one hundred thirty-three billion, four hundred fifty-one million, seven hundred twenty-three thousand, six hundred fifty-three".