29909840680 has 32 divisors (see below), whose sum is σ = 67305393000. Its totient is φ = 11962469376.

The previous prime is 29909840663. The next prime is 29909840771. The reversal of 29909840680 is 8604890992.

It can be written as a sum of positive squares in 4 ways, for example, as 28491414436 + 1418426244 = 168794^2 + 37662^2 .

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

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, 320644 + ... + 403276.

Almost surely, 2^29909840680 is an apocalyptic number.

29909840680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

29909840680 is an abundant number, since it is smaller than the sum of its proper divisors (37395552320).

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

29909840680 is a wasteful number, since it uses less digits than its factorization.

29909840680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91693 (or 91689 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 55.

The spelling of 29909840680 in words is "twenty-nine billion, nine hundred nine million, eight hundred forty thousand, six hundred eighty".