64540436731233 has 8 divisors (see below), whose sum is σ = 89021292043200. Its totient is φ = 41543269620048.

The previous prime is 64540436731213. The next prime is 64540436731241. The reversal of 64540436731233 is 33213763404546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64540436731233 - 2¹⁶ = 64540436665697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64540436731213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 370922050093 + ... + 370922050266.

It is an arithmetic number, because the mean of its divisors is an integer number (11127661505400).

Almost surely, 2^{64540436731233} is an apocalyptic number.

It is an amenable number.

64540436731233 is a deficient number, since it is larger than the sum of its proper divisors (24480855311967).

64540436731233 is a wasteful number, since it uses less digits than its factorization.

64540436731233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741844100391.

The product of its (nonzero) digits is 13063680, while the sum is 51.

The spelling of 64540436731233 in words is "sixty-four trillion, five hundred forty billion, four hundred thirty-six million, seven hundred thirty-one thousand, two hundred thirty-three".