685623288357 has 24 divisors (see below), whose sum is σ = 1131969587840. Its totient is φ = 391733845920.

The previous prime is 685623288341. The next prime is 685623288419. The reversal of 685623288357 is 753882326586.

685623288357 is a `hidden beast` number, since 6 + 8 + 562 + 32 + 8 + 8 + 35 + 7 = 666.

It is not a de Polignac number, because 685623288357 - 2⁴ = 685623288341 is a prime.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 685623288294 and 685623288303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685623283357) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 215257 + ... + 1190622.

Almost surely, 2^685623288357 is an apocalyptic number.

It is an amenable number.

685623288357 is a deficient number, since it is larger than the sum of its proper divisors (446346299483).

685623288357 is a wasteful number, since it uses less digits than its factorization.

685623288357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1413633 (or 1413630 counting only the distinct ones).

The product of its digits is 116121600, while the sum is 63.

The spelling of 685623288357 in words is "six hundred eighty-five billion, six hundred twenty-three million, two hundred eighty-eight thousand, three hundred fifty-seven".