860501656655 has 4 divisors (see below), whose sum is σ = 1032601987992. Its totient is φ = 688401325320.

The previous prime is 860501656649. The next prime is 860501656657. The reversal of 860501656655 is 556656105068.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 860501656655 - 2⁶ = 860501656591 is a prime.

It is a super-2 number, since 2×860501656655² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 860501656597 and 860501656606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (860501656657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86050165661 + ... + 86050165670.

It is an arithmetic number, because the mean of its divisors is an integer number (258150496998).

Almost surely, 2^860501656655 is an apocalyptic number.

860501656655 is a deficient number, since it is larger than the sum of its proper divisors (172100331337).

860501656655 is a wasteful number, since it uses less digits than its factorization.

860501656655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172100331336.

The product of its (nonzero) digits is 6480000, while the sum is 53.

The spelling of 860501656655 in words is "eight hundred sixty billion, five hundred one million, six hundred fifty-six thousand, six hundred fifty-five".