138060549225 has 135 divisors (see below), whose sum is σ = 268084994023. Its totient is φ = 70234702560.

The previous prime is 138060549217. The next prime is 138060549233. The reversal of 138060549225 is 522945060831.

The square root of 138060549225 is 371565.

It is a perfect power (a square), and thus also a powerful number.

138060549225 is a `hidden beast` number, since 1 + 3 + 80 + 6 + 0 + 549 + 2 + 25 = 666.

It is an interprime number because it is at equal distance from previous prime (138060549217) and next prime (138060549233).

It can be written as a sum of positive squares in only one way, i.e., 49701797721 + 88358751504 = 222939^2 + 297252^2 .

It is a tau number, because it is divible by the number of its divisors (135).

It is not a de Polignac number, because 138060549225 - 2³ = 138060549217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 384569596 + ... + 384569954.

Almost surely, 2^138060549225 is an apocalyptic number.

138060549225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138060549225 is the 371565-th square number.

138060549225 is the 185783-rd centered octagonal number.

It is an amenable number.

138060549225 is a deficient number, since it is larger than the sum of its proper divisors (130024444798).

138060549225 is an frugal number, since it uses more digits than its factorization.

138060549225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786 (or 390 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 138060549225 in words is "one hundred thirty-eight billion, sixty million, five hundred forty-nine thousand, two hundred twenty-five".