620402645245 has 4 divisors (see below), whose sum is σ = 744483174300. Its totient is φ = 496322116192.

The previous prime is 620402645243. The next prime is 620402645251. The reversal of 620402645245 is 542546204026.

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 485198619844 + 135204025401 = 696562^2 + 367701^2 .

It is a cyclic number.

It is not a de Polignac number, because 620402645245 - 2¹ = 620402645243 is a prime.

It is a super-2 number, since 2×620402645245² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 620402645198 and 620402645207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620402645243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62040264520 + ... + 62040264529.

It is an arithmetic number, because the mean of its divisors is an integer number (186120793575).

Almost surely, 2^620402645245 is an apocalyptic number.

It is an amenable number.

620402645245 is a deficient number, since it is larger than the sum of its proper divisors (124080529055).

620402645245 is a wasteful number, since it uses less digits than its factorization.

620402645245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124080529054.

The product of its (nonzero) digits is 460800, while the sum is 40.

The spelling of 620402645245 in words is "six hundred twenty billion, four hundred two million, six hundred forty-five thousand, two hundred forty-five".