620351214557 has 4 divisors (see below), whose sum is σ = 620357252700. Its totient is φ = 620345176416.

The previous prime is 620351214547. The next prime is 620351214559. The reversal of 620351214557 is 755412153026.

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

It can be written as a sum of positive squares in 2 ways, for example, as 454391935396 + 165959279161 = 674086^2 + 407381^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620351214557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620351214559) 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, 2862248 + ... + 3071345.

It is an arithmetic number, because the mean of its divisors is an integer number (155089313175).

Almost surely, 2^620351214557 is an apocalyptic number.

It is an amenable number.

620351214557 is a deficient number, since it is larger than the sum of its proper divisors (6038143).

620351214557 is a wasteful number, since it uses less digits than its factorization.

620351214557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6038142.

The product of its (nonzero) digits is 252000, while the sum is 41.

The spelling of 620351214557 in words is "six hundred twenty billion, three hundred fifty-one million, two hundred fourteen thousand, five hundred fifty-seven".