623635056302644 has 6 divisors (see below), whose sum is σ = 1091361348529634. Its totient is φ = 311817528151320.

The previous prime is 623635056302627. The next prime is 623635056302743. The reversal of 623635056302644 is 446203650536326.

It can be written as a sum of positive squares in only one way, i.e., 320410716000400 + 303224340302244 = 17900020^2 + 17413338^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77954382037827 + ... + 77954382037834.

Almost surely, 2^{623635056302644} is an apocalyptic number.

It is an amenable number.

623635056302644 is a deficient number, since it is larger than the sum of its proper divisors (467726292226990).

623635056302644 is a wasteful number, since it uses less digits than its factorization.

623635056302644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155908764075665 (or 155908764075663 counting only the distinct ones).

The product of its (nonzero) digits is 55987200, while the sum is 55.

The spelling of 623635056302644 in words is "six hundred twenty-three trillion, six hundred thirty-five billion, fifty-six million, three hundred two thousand, six hundred forty-four".