138211152500 has 30 divisors (see below), whose sum is σ = 302240153754. Its totient is φ = 55284460000.

The previous prime is 138211152487. The next prime is 138211152509. The reversal of 138211152500 is 5251112831.

It can be written as a sum of positive squares in 5 ways, for example, as 58242099556 + 79969052944 = 241334^2 + 282788^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138211152509) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 27639731 + ... + 27644730.

Almost surely, 2^138211152500 is an apocalyptic number.

138211152500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138211152500 is an abundant number, since it is smaller than the sum of its proper divisors (164029001254).

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

138211152500 is an equidigital number, since it uses as much as digits as its factorization.

138211152500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55284485 (or 55284468 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 29.

The spelling of 138211152500 in words is "one hundred thirty-eight billion, two hundred eleven million, one hundred fifty-two thousand, five hundred".