620130695981 has 32 divisors (see below), whose sum is σ = 639611652960. Its totient is φ = 601080832000.

The previous prime is 620130695909. The next prime is 620130696011. The reversal of 620130695981 is 189596031026.

It is a happy number.

620130695981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 16 ways, for example, as 3016755625 + 617113940356 = 54925^2 + 785566^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620130695981 is a prime.

It is a super-2 number, since 2×620130695981² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620130695881) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 455642741 + ... + 455644101.

It is an arithmetic number, because the mean of its divisors is an integer number (19987864155).

Almost surely, 2^620130695981 is an apocalyptic number.

It is an amenable number.

620130695981 is a deficient number, since it is larger than the sum of its proper divisors (19480956979).

620130695981 is a wasteful number, since it uses less digits than its factorization.

620130695981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2017.

The product of its (nonzero) digits is 699840, while the sum is 50.

The spelling of 620130695981 in words is "six hundred twenty billion, one hundred thirty million, six hundred ninety-five thousand, nine hundred eighty-one".