67641453043157 has 4 divisors (see below), whose sum is σ = 77304517763616. Its totient is φ = 57978388322700.

The previous prime is 67641453043133. The next prime is 67641453043211. The reversal of 67641453043157 is 75134035414676.

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 67641453043157 - 2³⁶ = 67572733566421 is a prime.

It is a super-2 number, since 2×67641453043157² (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 (67641453043127) 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, 4831532360219 + ... + 4831532360232.

It is an arithmetic number, because the mean of its divisors is an integer number (19326129440904).

Almost surely, 2^{67641453043157} is an apocalyptic number.

It is an amenable number.

67641453043157 is a deficient number, since it is larger than the sum of its proper divisors (9663064720459).

67641453043157 is an equidigital number, since it uses as much as digits as its factorization.

67641453043157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9663064720458.

The product of its (nonzero) digits is 25401600, while the sum is 56.

The spelling of 67641453043157 in words is "sixty-seven trillion, six hundred forty-one billion, four hundred fifty-three million, forty-three thousand, one hundred fifty-seven".