698447738691 has 12 divisors (see below), whose sum is σ = 1008883497232. Its totient is φ = 465625114416.

The previous prime is 698447738687. The next prime is 698447738699. The reversal of 698447738691 is 196837744896.

698447738691 is a `hidden beast` number, since 6 + 98 + 4 + 4 + 77 + 386 + 91 = 666.

It is not a de Polignac number, because 698447738691 - 2² = 698447738687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (698447738699) 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, 146730 + ... + 1190976.

Almost surely, 2^698447738691 is an apocalyptic number.

698447738691 is a deficient number, since it is larger than the sum of its proper divisors (310435758541).

698447738691 is a wasteful number, since it uses less digits than its factorization.

698447738691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1118570 (or 1118567 counting only the distinct ones).

The product of its digits is 438939648, while the sum is 72.

The spelling of 698447738691 in words is "six hundred ninety-eight billion, four hundred forty-seven million, seven hundred thirty-eight thousand, six hundred ninety-one".