138526554 has 16 divisors (see below), whose sum is σ = 279744192. Its totient is φ = 45727008.

The previous prime is 138526517. The next prime is 138526561. The reversal of 138526554 is 455625831.

138526554 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×138526554² = 38379212326229832, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111459 + ... + 112694.

It is an arithmetic number, because the mean of its divisors is an integer number (17484012).

Almost surely, 2^138526554 is an apocalyptic number.

138526554 is an abundant number, since it is smaller than the sum of its proper divisors (141217638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138526554 is a wasteful number, since it uses less digits than its factorization.

138526554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224261.

The product of its digits is 144000, while the sum is 39.

The square root of 138526554 is about 11769.7304132253. The cubic root of 138526554 is about 517.4213486388.

The spelling of 138526554 in words is "one hundred thirty-eight million, five hundred twenty-six thousand, five hundred fifty-four".