684949494411 has 128 divisors (see below), whose sum is σ = 1290102374400. Its totient is φ = 349392320640.

The previous prime is 684949494409. The next prime is 684949494443. The reversal of 684949494411 is 114494949486.

684949494411 is a `hidden beast` number, since 6 + 8 + 49 + 4 + 94 + 94 + 411 = 666.

It is not a de Polignac number, because 684949494411 - 2¹ = 684949494409 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (684949494311) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 165965830 + ... + 165969956.

It is an arithmetic number, because the mean of its divisors is an integer number (10078924800).

Almost surely, 2^684949494411 is an apocalyptic number.

684949494411 is a deficient number, since it is larger than the sum of its proper divisors (605152879989).

684949494411 is a wasteful number, since it uses less digits than its factorization.

684949494411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6366 (or 6360 counting only the distinct ones).

The product of its digits is 35831808, while the sum is 63.

The spelling of 684949494411 in words is "six hundred eighty-four billion, nine hundred forty-nine million, four hundred ninety-four thousand, four hundred eleven".