620335640461 has 4 divisors (see below), whose sum is σ = 620337217500. Its totient is φ = 620334063424.

The previous prime is 620335640443. The next prime is 620335640473. The reversal of 620335640461 is 164046533026.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 308670247561 + 311665392900 = 555581^2 + 558270^2 .

It is a cyclic number.

It is not a de Polignac number, because 620335640461 - 2²¹ = 620333543309 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 (620335640401) 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, 337605 + ... + 1163893.

It is an arithmetic number, because the mean of its divisors is an integer number (155084304375).

Almost surely, 2^620335640461 is an apocalyptic number.

It is an amenable number.

620335640461 is a deficient number, since it is larger than the sum of its proper divisors (1577039).

620335640461 is an equidigital number, since it uses as much as digits as its factorization.

620335640461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1577038.

The product of its (nonzero) digits is 311040, while the sum is 40.

The spelling of 620335640461 in words is "six hundred twenty billion, three hundred thirty-five million, six hundred forty thousand, four hundred sixty-one".