620502621348787 has 4 divisors (see below), whose sum is σ = 620502845651656. Its totient is φ = 620502397045920.

The previous prime is 620502621348767. The next prime is 620502621348803. The reversal of 620502621348787 is 787843126205026.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620502621348787 is a prime.

It is a super-2 number, since 2×620502621348787² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620502621348737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107949414 + ... + 113552107.

It is an arithmetic number, because the mean of its divisors is an integer number (155125711412914).

Almost surely, 2^{620502621348787} is an apocalyptic number.

620502621348787 is a deficient number, since it is larger than the sum of its proper divisors (224302869).

620502621348787 is a wasteful number, since it uses less digits than its factorization.

620502621348787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224302868.

The product of its (nonzero) digits is 54190080, while the sum is 61.

The spelling of 620502621348787 in words is "six hundred twenty trillion, five hundred two billion, six hundred twenty-one million, three hundred forty-eight thousand, seven hundred eighty-seven".