622656251355506 has 4 divisors (see below), whose sum is σ = 933984377033262. Its totient is φ = 311328125677752.

The previous prime is 622656251355451. The next prime is 622656251355511. The reversal of 622656251355506 is 605553152656226.

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., 564861210042481 + 57795041313025 = 23766809^2 + 7602305^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155664062838875 + ... + 155664062838878.

Almost surely, 2^{622656251355506} is an apocalyptic number.

622656251355506 is a deficient number, since it is larger than the sum of its proper divisors (311328125677756).

622656251355506 is a wasteful number, since it uses less digits than its factorization.

622656251355506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311328125677755.

The product of its (nonzero) digits is 97200000, while the sum is 59.

The spelling of 622656251355506 in words is "six hundred twenty-two trillion, six hundred fifty-six billion, two hundred fifty-one million, three hundred fifty-five thousand, five hundred six".