620015655 has 64 divisors (see below), whose sum is σ = 1188200448. Its totient is φ = 270103680.

The previous prime is 620015609. The next prime is 620015659. The reversal of 620015655 is 556510026.

It is not a de Polignac number, because 620015655 - 2⁷ = 620015527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620015659) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 216664 + ... + 219506.

It is an arithmetic number, because the mean of its divisors is an integer number (18565632).

Almost surely, 2^620015655 is an apocalyptic number.

620015655 is a deficient number, since it is larger than the sum of its proper divisors (568184793).

620015655 is a wasteful number, since it uses less digits than its factorization.

620015655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2956.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 620015655 is about 24900.1135539579. The cubic root of 620015655 is about 852.7090751754.

The spelling of 620015655 in words is "six hundred twenty million, fifteen thousand, six hundred fifty-five".