133465549381 has 16 divisors (see below), whose sum is σ = 143745710400. Its totient is φ = 123543335808.

The previous prime is 133465549337. The next prime is 133465549429. The reversal of 133465549381 is 183945564331.

It is not a de Polignac number, because 133465549381 - 2⁹ = 133465548869 is a prime.

It is a super-2 number, since 2×133465549381² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133465049381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 301246 + ... + 598063.

It is an arithmetic number, because the mean of its divisors is an integer number (8984106900).

Almost surely, 2^133465549381 is an apocalyptic number.

It is an amenable number.

133465549381 is a deficient number, since it is larger than the sum of its proper divisors (10280161019).

133465549381 is a wasteful number, since it uses less digits than its factorization.

133465549381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899508.

The product of its digits is 4665600, while the sum is 52.

The spelling of 133465549381 in words is "one hundred thirty-three billion, four hundred sixty-five million, five hundred forty-nine thousand, three hundred eighty-one".