406778635267 has 2 divisors, whose sum is σ = 406778635268. Its totient is φ = 406778635266.

The previous prime is 406778635261. The next prime is 406778635301. The reversal of 406778635267 is 762536877604.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 406778635267 - 2¹⁵ = 406778602499 is a prime.

It is a super-3 number, since 3×406778635267³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (406778635261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203389317633 + 203389317634.

It is an arithmetic number, because the mean of its divisors is an integer number (203389317634).

Almost surely, 2^406778635267 is an apocalyptic number.

406778635267 is a deficient number, since it is larger than the sum of its proper divisors (1).

406778635267 is an equidigital number, since it uses as much as digits as its factorization.

406778635267 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 71124480, while the sum is 61.

The spelling of 406778635267 in words is "four hundred six billion, seven hundred seventy-eight million, six hundred thirty-five thousand, two hundred sixty-seven".