637242430427 has 2 divisors, whose sum is σ = 637242430428. Its totient is φ = 637242430426.

The previous prime is 637242430351. The next prime is 637242430459. The reversal of 637242430427 is 724034242736.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-637242430427 is a prime.

It is not a weakly prime, because it can be changed into another prime (637242460427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318621215213 + 318621215214.

It is an arithmetic number, because the mean of its divisors is an integer number (318621215214).

Almost surely, 2^637242430427 is an apocalyptic number.

637242430427 is a deficient number, since it is larger than the sum of its proper divisors (1).

637242430427 is an equidigital number, since it uses as much as digits as its factorization.

637242430427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1354752, while the sum is 44.

The spelling of 637242430427 in words is "six hundred thirty-seven billion, two hundred forty-two million, four hundred thirty thousand, four hundred twenty-seven".