134400553521 has 128 divisors (see below), whose sum is σ = 219616137216. Its totient is φ = 72245944320.

The previous prime is 134400553519. The next prime is 134400553597. The reversal of 134400553521 is 125355004431.

It is not a de Polignac number, because 134400553521 - 2¹ = 134400553519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (134400553501) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 141921970 + ... + 141922916.

It is an arithmetic number, because the mean of its divisors is an integer number (1715751072).

Almost surely, 2^134400553521 is an apocalyptic number.

It is an amenable number.

134400553521 is a deficient number, since it is larger than the sum of its proper divisors (85215583695).

134400553521 is a wasteful number, since it uses less digits than its factorization.

134400553521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271.

The product of its (nonzero) digits is 36000, while the sum is 33.

Adding to 134400553521 its reverse (125355004431), we get a palindrome (259755557952).

The spelling of 134400553521 in words is "one hundred thirty-four billion, four hundred million, five hundred fifty-three thousand, five hundred twenty-one".