620120656513 has 4 divisors (see below), whose sum is σ = 627591989808. Its totient is φ = 612649323220.

The previous prime is 620120656511. The next prime is 620120656517. The reversal of 620120656513 is 315656021026.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 620120656513 - 2¹ = 620120656511 is a prime.

It is a super-2 number, since 2×620120656513² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620120656511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3735666523 + ... + 3735666688.

It is an arithmetic number, because the mean of its divisors is an integer number (156897997452).

Almost surely, 2^620120656513 is an apocalyptic number.

It is an amenable number.

620120656513 is a deficient number, since it is larger than the sum of its proper divisors (7471333295).

620120656513 is an equidigital number, since it uses as much as digits as its factorization.

620120656513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7471333294.

The product of its (nonzero) digits is 64800, while the sum is 37.

Adding to 620120656513 its reverse (315656021026), we get a palindrome (935776677539).

The spelling of 620120656513 in words is "six hundred twenty billion, one hundred twenty million, six hundred fifty-six thousand, five hundred thirteen".