138551455 has 16 divisors (see below), whose sum is σ = 190333440. Its totient is φ = 94846752.

The previous prime is 138551453. The next prime is 138551503. The reversal of 138551455 is 554155831.

138551455 = T₇₄₄₂ + T₇₄₄₃ + ... + T₇₄₄₆.

It is not a de Polignac number, because 138551455 - 2¹ = 138551453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138551453) 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, 20062 + ... + 26068.

It is an arithmetic number, because the mean of its divisors is an integer number (11895840).

Almost surely, 2^138551455 is an apocalyptic number.

138551455 is a deficient number, since it is larger than the sum of its proper divisors (51781985).

138551455 is an equidigital number, since it uses as much as digits as its factorization.

138551455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6678.

The product of its digits is 60000, while the sum is 37.

The square root of 138551455 is about 11770.7882064032. The cubic root of 138551455 is about 517.4523500044.

The spelling of 138551455 in words is "one hundred thirty-eight million, five hundred fifty-one thousand, four hundred fifty-five".