254136425639 has 2 divisors, whose sum is σ = 254136425640. Its totient is φ = 254136425638.

The previous prime is 254136425633. The next prime is 254136425659. The reversal of 254136425639 is 936524631452.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 254136425639 - 2²⁰ = 254135377063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (254136425633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127068212819 + 127068212820.

It is an arithmetic number, because the mean of its divisors is an integer number (127068212820).

Almost surely, 2^254136425639 is an apocalyptic number.

254136425639 is a deficient number, since it is larger than the sum of its proper divisors (1).

254136425639 is an equidigital number, since it uses as much as digits as its factorization.

254136425639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4665600, while the sum is 50.

The spelling of 254136425639 in words is "two hundred fifty-four billion, one hundred thirty-six million, four hundred twenty-five thousand, six hundred thirty-nine".