138426250498 has 4 divisors (see below), whose sum is σ = 207639375750. Its totient is φ = 69213125248.

The previous prime is 138426250483. The next prime is 138426250499. The reversal of 138426250498 is 894052624831.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 73193514849 + 65232735649 = 270543^2 + 255407^2 .

It is not an unprimeable number, because it can be changed into a prime (138426250499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34606562623 + ... + 34606562626.

Almost surely, 2^138426250498 is an apocalyptic number.

138426250498 is a deficient number, since it is larger than the sum of its proper divisors (69213125252).

138426250498 is an equidigital number, since it uses as much as digits as its factorization.

138426250498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69213125251.

The product of its (nonzero) digits is 3317760, while the sum is 52.

The spelling of 138426250498 in words is "one hundred thirty-eight billion, four hundred twenty-six million, two hundred fifty thousand, four hundred ninety-eight".