36545640121 has 4 divisors (see below), whose sum is σ = 36907478244. Its totient is φ = 36183802000.

The previous prime is 36545640113. The next prime is 36545640137. The reversal of 36545640121 is 12104654563.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15740462521 + 20805177600 = 125461^2 + 144240^2 .

It is a cyclic number.

It is not a de Polignac number, because 36545640121 - 2³ = 36545640113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36545640161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180918910 + ... + 180919111.

It is an arithmetic number, because the mean of its divisors is an integer number (9226869561).

Almost surely, 2^36545640121 is an apocalyptic number.

It is an amenable number.

36545640121 is a deficient number, since it is larger than the sum of its proper divisors (361838123).

36545640121 is a wasteful number, since it uses less digits than its factorization.

36545640121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361838122.

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 36545640121 in words is "thirty-six billion, five hundred forty-five million, six hundred forty thousand, one hundred twenty-one".