620416921640 has 64 divisors (see below), whose sum is σ = 1430185695120. Its totient is φ = 242080000000.

The previous prime is 620416921639. The next prime is 620416921643. The reversal of 620416921640 is 46129614026.

It can be written as a sum of positive squares in 8 ways, for example, as 35170501444 + 585246420196 = 187538^2 + 765014^2 .

It is a Harshad number since it is a multiple of its sum of digits (41).

It is not an unprimeable number, because it can be changed into a prime (620416921643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13919390 + ... + 13963890.

Almost surely, 2^620416921640 is an apocalyptic number.

It is an amenable number.

620416921640 is an abundant number, since it is smaller than the sum of its proper divisors (809768773480).

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

620416921640 is a wasteful number, since it uses less digits than its factorization.

620416921640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53054 (or 53050 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 41.

The spelling of 620416921640 in words is "six hundred twenty billion, four hundred sixteen million, nine hundred twenty-one thousand, six hundred forty".