61550445536 has 12 divisors (see below), whose sum is σ = 121177439712. Its totient is φ = 30775222752.

The previous prime is 61550445511. The next prime is 61550445557. The reversal of 61550445536 is 63554405516.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 961725680 + ... + 961725743.

It is an arithmetic number, because the mean of its divisors is an integer number (10098119976).

Almost surely, 2^61550445536 is an apocalyptic number.

It is an amenable number.

61550445536 is a deficient number, since it is larger than the sum of its proper divisors (59626994176).

61550445536 is a wasteful number, since it uses less digits than its factorization.

61550445536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1923451433 (or 1923451425 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 44.

The spelling of 61550445536 in words is "sixty-one billion, five hundred fifty million, four hundred forty-five thousand, five hundred thirty-six".