61654044650 has 48 divisors (see below), whose sum is σ = 129137234688. Its totient is φ = 21696432000.

The previous prime is 61654044611. The next prime is 61654044671. The reversal of 61654044650 is 5644045616.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 61654044598 and 61654044607.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1790987 + ... + 1825086.

It is an arithmetic number, because the mean of its divisors is an integer number (2690359056).

Almost surely, 2^61654044650 is an apocalyptic number.

61654044650 is an abundant number, since it is smaller than the sum of its proper divisors (67483190038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61654044650 is a wasteful number, since it uses less digits than its factorization.

61654044650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3616127 (or 3616122 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 41.

The spelling of 61654044650 in words is "sixty-one billion, six hundred fifty-four million, forty-four thousand, six hundred fifty".