138528725401 has 16 divisors (see below), whose sum is σ = 160095071808. Its totient is φ = 118465561600.

The previous prime is 138528725369. The next prime is 138528725411. The reversal of 138528725401 is 104527825831.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 138528725401 - 2⁵ = 138528725369 is a prime.

It is a super-2 number, since 2×138528725401² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138528725411) 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, 169281 + ... + 552913.

It is an arithmetic number, because the mean of its divisors is an integer number (10005941988).

Almost surely, 2^138528725401 is an apocalyptic number.

138528725401 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

138528725401 is a deficient number, since it is larger than the sum of its proper divisors (21566346407).

138528725401 is a wasteful number, since it uses less digits than its factorization.

138528725401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385592.

The product of its (nonzero) digits is 537600, while the sum is 46.

The spelling of 138528725401 in words is "one hundred thirty-eight billion, five hundred twenty-eight million, seven hundred twenty-five thousand, four hundred one".