67428678126965 has 4 divisors (see below), whose sum is σ = 80914413752364. Its totient is φ = 53942942501568.

The previous prime is 67428678126937. The next prime is 67428678127081. The reversal of 67428678126965 is 56962187682476.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12664075230244 + 54764602896721 = 3558662^2 + 7400311^2 .

It is a cyclic number.

It is not a de Polignac number, because 67428678126965 - 2¹⁶ = 67428678061429 is a prime.

It is a super-2 number, since 2×67428678126965² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6742867812692 + ... + 6742867812701.

It is an arithmetic number, because the mean of its divisors is an integer number (20228603438091).

Almost surely, 2^{67428678126965} is an apocalyptic number.

It is an amenable number.

67428678126965 is a deficient number, since it is larger than the sum of its proper divisors (13485735625399).

67428678126965 is a wasteful number, since it uses less digits than its factorization.

67428678126965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13485735625398.

The product of its digits is 2926264320, while the sum is 77.

The spelling of 67428678126965 in words is "sixty-seven trillion, four hundred twenty-eight billion, six hundred seventy-eight million, one hundred twenty-six thousand, nine hundred sixty-five".