61865970212 has 48 divisors (see below), whose sum is σ = 110687068800. Its totient is φ = 30249158400.

The previous prime is 61865970209. The next prime is 61865970227. The reversal of 61865970212 is 21207956816.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31260239 + ... + 31262217.

It is an arithmetic number, because the mean of its divisors is an integer number (2305980600).

Almost surely, 2^61865970212 is an apocalyptic number.

It is an amenable number.

61865970212 is a deficient number, since it is larger than the sum of its proper divisors (48821098588).

61865970212 is a wasteful number, since it uses less digits than its factorization.

61865970212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2916 (or 2914 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 47.

The spelling of 61865970212 in words is "sixty-one billion, eight hundred sixty-five million, nine hundred seventy thousand, two hundred twelve".