29686686489 has 16 divisors (see below), whose sum is σ = 44415728640. Its totient is φ = 19595170800.

The previous prime is 29686686487. The next prime is 29686686527. The reversal of 29686686489 is 98468668692.

29686686489 is a `hidden beast` number, since 2 + 9 + 6 + 8 + 66 + 86 + 489 = 666.

It is not a de Polignac number, because 29686686489 - 2¹ = 29686686487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (29686686487) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5440377 + ... + 5445830.

It is an arithmetic number, because the mean of its divisors is an integer number (2775983040).

Almost surely, 2^29686686489 is an apocalyptic number.

It is an amenable number.

29686686489 is a deficient number, since it is larger than the sum of its proper divisors (14729042151).

29686686489 is a wasteful number, since it uses less digits than its factorization.

29686686489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10886317 (or 10886311 counting only the distinct ones).

The product of its digits is 429981696, while the sum is 72.

The spelling of 29686686489 in words is "twenty-nine billion, six hundred eighty-six million, six hundred eighty-six thousand, four hundred eighty-nine".