36561621550 has 24 divisors (see below), whose sum is σ = 68501012976. Its totient is φ = 14517896640.

The previous prime is 36561621541. The next prime is 36561621637. The reversal of 36561621550 is 5512616563.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2661882 + ... + 2675581.

It is an arithmetic number, because the mean of its divisors is an integer number (2854208874).

Almost surely, 2^36561621550 is an apocalyptic number.

36561621550 is a deficient number, since it is larger than the sum of its proper divisors (31939391426).

36561621550 is a wasteful number, since it uses less digits than its factorization.

36561621550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5337612 (or 5337607 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 40.

The spelling of 36561621550 in words is "thirty-six billion, five hundred sixty-one million, six hundred twenty-one thousand, five hundred fifty".