63640735325733 has 4 divisors (see below), whose sum is σ = 84854313767648. Its totient is φ = 42427156883820.

The previous prime is 63640735325677. The next prime is 63640735325743. The reversal of 63640735325733 is 33752353704636.

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 not a de Polignac number, because 63640735325733 - 2⁶ = 63640735325669 is a prime.

It is a super-2 number, since 2×63640735325733² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63640735325743) 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, 10606789220953 + ... + 10606789220958.

It is an arithmetic number, because the mean of its divisors is an integer number (21213578441912).

Almost surely, 2^{63640735325733} is an apocalyptic number.

It is an amenable number.

63640735325733 is a deficient number, since it is larger than the sum of its proper divisors (21213578441915).

63640735325733 is a wasteful number, since it uses less digits than its factorization.

63640735325733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21213578441914.

The product of its (nonzero) digits is 85730400, while the sum is 57.

The spelling of 63640735325733 in words is "sixty-three trillion, six hundred forty billion, seven hundred thirty-five million, three hundred twenty-five thousand, seven hundred thirty-three".