61212388436 has 12 divisors (see below), whose sum is σ = 108630436320. Its totient is φ = 30175120920.

The previous prime is 61212388429. The next prime is 61212388477. The reversal of 61212388436 is 63488321216.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107768006 + ... + 107768573.

It is an arithmetic number, because the mean of its divisors is an integer number (9052536360).

Almost surely, 2^61212388436 is an apocalyptic number.

It is an amenable number.

61212388436 is a deficient number, since it is larger than the sum of its proper divisors (47418047884).

61212388436 is a wasteful number, since it uses less digits than its factorization.

61212388436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215536654 (or 215536652 counting only the distinct ones).

The product of its digits is 331776, while the sum is 44.

The spelling of 61212388436 in words is "sixty-one billion, two hundred twelve million, three hundred eighty-eight thousand, four hundred thirty-six".