133723309090521 has 16 divisors (see below), whose sum is σ = 183116938009664. Its totient is φ = 86739285253824.

The previous prime is 133723309090507. The next prime is 133723309090523. The reversal of 133723309090521 is 125090903327331.

It is not a de Polignac number, because 133723309090521 - 2¹⁵ = 133723309057753 is a prime.

It is the 11563880-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133723309090523) by changing a digit.

It is a nontrivial repunit in base 11563879.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112610151 + ... + 113791443.

It is an arithmetic number, because the mean of its divisors is an integer number (11444808625604).

Almost surely, 2^{133723309090521} is an apocalyptic number.

It is an amenable number.

133723309090521 is a deficient number, since it is larger than the sum of its proper divisors (49393628919143).

133723309090521 is a wasteful number, since it uses less digits than its factorization.

133723309090521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2201160.

The product of its (nonzero) digits is 918540, while the sum is 48.

The spelling of 133723309090521 in words is "one hundred thirty-three trillion, seven hundred twenty-three billion, three hundred nine million, ninety thousand, five hundred twenty-one".