29490779138 has 16 divisors (see below), whose sum is σ = 46884316320. Its totient is φ = 13864378176.

The previous prime is 29490779119. The next prime is 29490779159. The reversal of 29490779138 is 83197709492.

It is a Curzon 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, 390956 + ... + 460247.

It is an arithmetic number, because the mean of its divisors is an integer number (2930269770).

Almost surely, 2^29490779138 is an apocalyptic number.

29490779138 is a deficient number, since it is larger than the sum of its proper divisors (17393537182).

29490779138 is a wasteful number, since it uses less digits than its factorization.

29490779138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852241.

The product of its (nonzero) digits is 6858432, while the sum is 59.

The spelling of 29490779138 in words is "twenty-nine billion, four hundred ninety million, seven hundred seventy-nine thousand, one hundred thirty-eight".