4020507655 has 24 divisors (see below), whose sum is σ = 5087436480. Its totient is φ = 3046592640.

The previous prime is 4020507643. The next prime is 4020507661. The reversal of 4020507655 is 5567050204.

It is not a de Polignac number, because 4020507655 - 2⁹ = 4020507143 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4020507655.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 402370 + ... + 412240.

It is an arithmetic number, because the mean of its divisors is an integer number (211976520).

Almost surely, 2^4020507655 is an apocalyptic number.

4020507655 is a deficient number, since it is larger than the sum of its proper divisors (1066928825).

4020507655 is an equidigital number, since it uses as much as digits as its factorization.

4020507655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10011 (or 9958 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 34.

The square root of 4020507655 is about 63407.4731794289. The cubic root of 4020507655 is about 1590.1092517522.

Adding to 4020507655 its reverse (5567050204), we get a palindrome (9587557859).

The spelling of 4020507655 in words is "four billion, twenty million, five hundred seven thousand, six hundred fifty-five".