61830328906 has 4 divisors (see below), whose sum is σ = 92745493362. Its totient is φ = 30915164452.

The previous prime is 61830328897. The next prime is 61830328939. The reversal of 61830328906 is 60982303816.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 34916285881 + 26914043025 = 186859^2 + 164055^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15457582225 + ... + 15457582228.

Almost surely, 2^61830328906 is an apocalyptic number.

61830328906 is a deficient number, since it is larger than the sum of its proper divisors (30915164456).

61830328906 is a wasteful number, since it uses less digits than its factorization.

61830328906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30915164455.

The product of its (nonzero) digits is 373248, while the sum is 46.

The spelling of 61830328906 in words is "sixty-one billion, eight hundred thirty million, three hundred twenty-eight thousand, nine hundred six".