505655510651 has 16 divisors (see below), whose sum is σ = 583012663200. Its totient is φ = 435316105728.

The previous prime is 505655510639. The next prime is 505655510663. The reversal of 505655510651 is 156015556505.

It is an interprime number because it is at equal distance from previous prime (505655510639) and next prime (505655510663).

It is a cyclic number.

It is not a de Polignac number, because 505655510651 - 2¹⁸ = 505655248507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505655510681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26981960 + ... + 27000693.

It is an arithmetic number, because the mean of its divisors is an integer number (36438291450).

Almost surely, 2^505655510651 is an apocalyptic number.

505655510651 is a deficient number, since it is larger than the sum of its proper divisors (77357152549).

505655510651 is a wasteful number, since it uses less digits than its factorization.

505655510651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53982718.

The product of its (nonzero) digits is 562500, while the sum is 44.

The spelling of 505655510651 in words is "five hundred five billion, six hundred fifty-five million, five hundred ten thousand, six hundred fifty-one".