64532855737 has 4 divisors (see below), whose sum is σ = 73751835136. Its totient is φ = 55313876340.

The previous prime is 64532855719. The next prime is 64532855743. The reversal of 64532855737 is 73755823546.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64532855737 - 2³¹ = 62385372089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64532855237) 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, 4609489689 + ... + 4609489702.

It is an arithmetic number, because the mean of its divisors is an integer number (18437958784).

Almost surely, 2^64532855737 is an apocalyptic number.

It is an amenable number.

64532855737 is a deficient number, since it is larger than the sum of its proper divisors (9218979399).

64532855737 is an equidigital number, since it uses as much as digits as its factorization.

64532855737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9218979398.

The product of its digits is 21168000, while the sum is 55.

The spelling of 64532855737 in words is "sixty-four billion, five hundred thirty-two million, eight hundred fifty-five thousand, seven hundred thirty-seven".