65190426167681 has 4 divisors (see below), whose sum is σ = 67293343140864. Its totient is φ = 63087509194500.

The previous prime is 65190426167623. The next prime is 65190426167717. The reversal of 65190426167681 is 18676162409156.

It is a happy number.

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 65190426167681 - 2⁶ = 65190426167617 is a prime.

It is a super-2 number, since 2×65190426167681² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65190426167081) 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, 1051458486545 + ... + 1051458486606.

It is an arithmetic number, because the mean of its divisors is an integer number (16823335785216).

Almost surely, 2^{65190426167681} is an apocalyptic number.

It is an amenable number.

65190426167681 is a deficient number, since it is larger than the sum of its proper divisors (2102916973183).

65190426167681 is a wasteful number, since it uses less digits than its factorization.

65190426167681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2102916973182.

The product of its (nonzero) digits is 26127360, while the sum is 62.

The spelling of 65190426167681 in words is "sixty-five trillion, one hundred ninety billion, four hundred twenty-six million, one hundred sixty-seven thousand, six hundred eighty-one".