621776016 has 30 divisors (see below), whose sum is σ = 1740109670. Its totient is φ = 207258624.

The previous prime is 621775981. The next prime is 621776017. The reversal of 621776016 is 610677126.

It can be written as a sum of positive squares in only one way, i.e., 608115600 + 13660416 = 24660^2 + 3696^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (621776017) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2158801 + ... + 2159088.

Almost surely, 2^621776016 is an apocalyptic number.

It is an amenable number.

621776016 is an abundant number, since it is smaller than the sum of its proper divisors (1118333654).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

621776016 is a wasteful number, since it uses less digits than its factorization.

621776016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4317903 (or 4317894 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 621776016 is about 24935.4369522573. The cubic root of 621776016 is about 853.5153222416.

The spelling of 621776016 in words is "six hundred twenty-one million, seven hundred seventy-six thousand, sixteen".