138776625 has 64 divisors (see below), whose sum is σ = 276407040. Its totient is φ = 68299200.

The previous prime is 138776623. The next prime is 138776657. The reversal of 138776625 is 526677831.

138776625 is a `hidden beast` number, since 13 + 8 + 7 + 7 + 6 + 625 = 666.

It is not a de Polignac number, because 138776625 - 2¹ = 138776623 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (138776623) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 42294 + ... + 45456.

It is an arithmetic number, because the mean of its divisors is an integer number (4318860).

Almost surely, 2^138776625 is an apocalyptic number.

138776625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138776625 is a deficient number, since it is larger than the sum of its proper divisors (137630415).

138776625 is a wasteful number, since it uses less digits than its factorization.

138776625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3200 (or 3184 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The square root of 138776625 is about 11780.3491034859. The cubic root of 138776625 is about 517.7325147123.

It can be divided in two parts, 13877 and 6625, that added together give a palindrome (20502).

The spelling of 138776625 in words is "one hundred thirty-eight million, seven hundred seventy-six thousand, six hundred twenty-five".