621650505 has 48 divisors (see below), whose sum is σ = 1188354240. Its totient is φ = 276490368.

The previous prime is 621650489. The next prime is 621650507. The reversal of 621650505 is 505056126.

It is not a de Polignac number, because 621650505 - 2⁴ = 621650489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (621650507) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15766 + ... + 38624.

It is an arithmetic number, because the mean of its divisors is an integer number (24757380).

Almost surely, 2^621650505 is an apocalyptic number.

It is an amenable number.

621650505 is a deficient number, since it is larger than the sum of its proper divisors (566703735).

621650505 is a wasteful number, since it uses less digits than its factorization.

621650505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22918 (or 22911 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 621650505 is about 24932.9201057558. The cubic root of 621650505 is about 853.4578884993.

The spelling of 621650505 in words is "six hundred twenty-one million, six hundred fifty thousand, five hundred five".