621763745 has 16 divisors (see below), whose sum is σ = 771489792. Its totient is φ = 480550080.

The previous prime is 621763711. The next prime is 621763757. The reversal of 621763745 is 547367126.

It is a de Polignac number, because none of the positive numbers 2^k-621763745 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98144 + ... + 104286.

It is an arithmetic number, because the mean of its divisors is an integer number (48218112).

Almost surely, 2^621763745 is an apocalyptic number.

It is an amenable number.

621763745 is a deficient number, since it is larger than the sum of its proper divisors (149726047).

621763745 is a wasteful number, since it uses less digits than its factorization.

621763745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6832.

The product of its digits is 211680, while the sum is 41.

The square root of 621763745 is about 24935.1908955997. The cubic root of 621763745 is about 853.5097073819.

The spelling of 621763745 in words is "six hundred twenty-one million, seven hundred sixty-three thousand, seven hundred forty-five".