684978454662 has 16 divisors (see below), whose sum is σ = 1371889156080. Its totient is φ = 228004110432.

The previous prime is 684978454591. The next prime is 684978454679. The reversal of 684978454662 is 266454879486.

It is a super-2 number, since 2×684978454662² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80505673 + ... + 80514180.

It is an arithmetic number, because the mean of its divisors is an integer number (85743072255).

Almost surely, 2^684978454662 is an apocalyptic number.

684978454662 is an abundant number, since it is smaller than the sum of its proper divisors (686910701418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

684978454662 is a wasteful number, since it uses less digits than its factorization.

684978454662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161020567.

The product of its digits is 557383680, while the sum is 69.

The spelling of 684978454662 in words is "six hundred eighty-four billion, nine hundred seventy-eight million, four hundred fifty-four thousand, six hundred sixty-two".