621349563467 has 4 divisors (see below), whose sum is σ = 621405769656. Its totient is φ = 621293357280.

The previous prime is 621349563463. The next prime is 621349563469. The reversal of 621349563467 is 764365943126.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 621349563467 - 2² = 621349563463 is a prime.

It is a super-2 number, since 2×621349563467² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621349563463) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 28086509 + ... + 28108622.

It is an arithmetic number, because the mean of its divisors is an integer number (155351442414).

Almost surely, 2^621349563467 is an apocalyptic number.

621349563467 is a deficient number, since it is larger than the sum of its proper divisors (56206189).

621349563467 is a wasteful number, since it uses less digits than its factorization.

621349563467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56206188.

The product of its digits is 19595520, while the sum is 56.

The spelling of 621349563467 in words is "six hundred twenty-one billion, three hundred forty-nine million, five hundred sixty-three thousand, four hundred sixty-seven".