620515655 has 8 divisors (see below), whose sum is σ = 745333584. Its totient is φ = 495936000.

The previous prime is 620515633. The next prime is 620515663. The reversal of 620515655 is 556515026.

620515655 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 620515655 - 2⁶ = 620515591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53786 + ... + 64295.

It is an arithmetic number, because the mean of its divisors is an integer number (93166698).

Almost surely, 2^620515655 is an apocalyptic number.

620515655 is a deficient number, since it is larger than the sum of its proper divisors (124817929).

620515655 is a wasteful number, since it uses less digits than its factorization.

620515655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119137.

The product of its (nonzero) digits is 45000, while the sum is 35.

The square root of 620515655 is about 24910.1516454637. The cubic root of 620515655 is about 852.9382306690.

The spelling of 620515655 in words is "six hundred twenty million, five hundred fifteen thousand, six hundred fifty-five".