684706651137 has 12 divisors (see below), whose sum is σ = 1020924612864. Its totient is φ = 441746226360.

The previous prime is 684706651117. The next prime is 684706651159. The reversal of 684706651137 is 731156607486.

684706651137 is a `hidden beast` number, since 68 + 4 + 7 + 0 + 66 + 511 + 3 + 7 = 666.

684706651137 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 684706651137 - 2¹⁵ = 684706618369 is a prime.

It is a super-2 number, since 2×684706651137² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (684706651117) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1227072573 + ... + 1227073130.

It is an arithmetic number, because the mean of its divisors is an integer number (85077051072).

Almost surely, 2^684706651137 is an apocalyptic number.

It is an amenable number.

684706651137 is a deficient number, since it is larger than the sum of its proper divisors (336217961727).

684706651137 is a wasteful number, since it uses less digits than its factorization.

684706651137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2454145740 (or 2454145737 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 54.

The spelling of 684706651137 in words is "six hundred eighty-four billion, seven hundred six million, six hundred fifty-one thousand, one hundred thirty-seven".