61635590812 has 12 divisors (see below), whose sum is σ = 108004026816. Its totient is φ = 30777297440.

The previous prime is 61635590789. The next prime is 61635590839. The reversal of 61635590812 is 21809553616.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10121068 + ... + 10127155.

It is an arithmetic number, because the mean of its divisors is an integer number (9000335568).

Almost surely, 2^61635590812 is an apocalyptic number.

It is an amenable number.

61635590812 is a deficient number, since it is larger than the sum of its proper divisors (46368436004).

61635590812 is a wasteful number, since it uses less digits than its factorization.

61635590812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20248988 (or 20248986 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 46.

The spelling of 61635590812 in words is "sixty-one billion, six hundred thirty-five million, five hundred ninety thousand, eight hundred twelve".