655165647861 has 16 divisors (see below), whose sum is σ = 919560027840. Its totient is φ = 413775648000.

The previous prime is 655165647817. The next prime is 655165647863. The reversal of 655165647861 is 168746561556.

It is not a de Polignac number, because 655165647861 - 2³⁷ = 517726694389 is a prime.

It is a super-2 number, since 2×655165647861² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 655165647795 and 655165647804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655165647863) 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, 1810611 + ... + 2142111.

It is an arithmetic number, because the mean of its divisors is an integer number (57472501740).

Almost surely, 2^655165647861 is an apocalyptic number.

It is an amenable number.

655165647861 is a deficient number, since it is larger than the sum of its proper divisors (264394379979).

655165647861 is a wasteful number, since it uses less digits than its factorization.

655165647861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366196.

The product of its digits is 36288000, while the sum is 60.

The spelling of 655165647861 in words is "six hundred fifty-five billion, one hundred sixty-five million, six hundred forty-seven thousand, eight hundred sixty-one".