36561308640 has 96 divisors (see below), whose sum is σ = 116075151360. Its totient is φ = 9672897024.

The previous prime is 36561308617. The next prime is 36561308671. The reversal of 36561308640 is 4680316563.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 36561308592 and 36561308601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 238920 + ... + 360839.

It is an arithmetic number, because the mean of its divisors is an integer number (1209116160).

Almost surely, 2^36561308640 is an apocalyptic number.

36561308640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

36561308640 is an abundant number, since it is smaller than the sum of its proper divisors (79513842720).

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

36561308640 is a wasteful number, since it uses less digits than its factorization.

36561308640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599904 (or 599896 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 36561308640 in words is "thirty-six billion, five hundred sixty-one million, three hundred eight thousand, six hundred forty".