29780013530 has 16 divisors (see below), whose sum is σ = 53803300680. Its totient is φ = 11867721792.

The previous prime is 29780013511. The next prime is 29780013541. The reversal of 29780013530 is 3531008792.

It can be written as a sum of positive squares in 4 ways, for example, as 17278313809 + 12501699721 = 131447^2 + 111811^2 .

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, 5532629 + ... + 5538008.

Almost surely, 2^29780013530 is an apocalyptic number.

29780013530 is a deficient number, since it is larger than the sum of its proper divisors (24023287150).

29780013530 is a wasteful number, since it uses less digits than its factorization.

29780013530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11070913.

The product of its (nonzero) digits is 45360, while the sum is 38.

The spelling of 29780013530 in words is "twenty-nine billion, seven hundred eighty million, thirteen thousand, five hundred thirty".