67641443656253 has 4 divisors (see below), whose sum is σ = 67641484820448. Its totient is φ = 67641402492060.

The previous prime is 67641443656177. The next prime is 67641443656261. The reversal of 67641443656253 is 35265634414676.

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 67641443656253 - 2⁸ = 67641443655997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67641443956253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18010151 + ... + 21439412.

It is an arithmetic number, because the mean of its divisors is an integer number (16910371205112).

Almost surely, 2^{67641443656253} is an apocalyptic number.

It is an amenable number.

67641443656253 is a deficient number, since it is larger than the sum of its proper divisors (41164195).

67641443656253 is a wasteful number, since it uses less digits than its factorization.

67641443656253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41164194.

The product of its digits is 261273600, while the sum is 62.

The spelling of 67641443656253 in words is "sixty-seven trillion, six hundred forty-one billion, four hundred forty-three million, six hundred fifty-six thousand, two hundred fifty-three".