621223454053456 has 40 divisors (see below), whose sum is σ = 1219445957927808. Its totient is φ = 306547500240000.

The previous prime is 621223454053453. The next prime is 621223454053541. The reversal of 621223454053456 is 654350454322126.

It is a happy number.

It is a super-3 number, since 3×621223454053456³ (a number of 45 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621223454053453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 617536740 + ... + 618541891.

Almost surely, 2^{621223454053456} is an apocalyptic number.

It is an amenable number.

621223454053456 is a deficient number, since it is larger than the sum of its proper divisors (598222503874352).

621223454053456 is a wasteful number, since it uses less digits than its factorization.

621223454053456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236079051 (or 1236079045 counting only the distinct ones).

The product of its (nonzero) digits is 20736000, while the sum is 52.

The spelling of 621223454053456 in words is "six hundred twenty-one trillion, two hundred twenty-three billion, four hundred fifty-four million, fifty-three thousand, four hundred fifty-six".