620745233994 has 64 divisors (see below), whose sum is σ = 1398956993280. Its totient is φ = 204002841600.

The previous prime is 620745233923. The next prime is 620745234049. The reversal of 620745233994 is 499332547026.

620745233994 is a `hidden beast` number, since 6 + 20 + 7 + 4 + 523 + 3 + 9 + 94 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 620745233994.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1152294 + ... + 1602894.

It is an arithmetic number, because the mean of its divisors is an integer number (21858703020).

Almost surely, 2^620745233994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 620745233994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (699478496640).

620745233994 is an abundant number, since it is smaller than the sum of its proper divisors (778211759286).

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

620745233994 is a wasteful number, since it uses less digits than its factorization.

620745233994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450972 (or 450966 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 54.

The spelling of 620745233994 in words is "six hundred twenty billion, seven hundred forty-five million, two hundred thirty-three thousand, nine hundred ninety-four".