415403878649 has 2 divisors, whose sum is σ = 415403878650. Its totient is φ = 415403878648.

The previous prime is 415403878609. The next prime is 415403878739. The reversal of 415403878649 is 946878304514.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 402108174400 + 13295704249 = 634120^2 + 115307^2 .

It is a cyclic number.

It is not a de Polignac number, because 415403878649 - 2²⁴ = 415387101433 is a prime.

It is not a weakly prime, because it can be changed into another prime (415403878609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 207701939324 + 207701939325.

It is an arithmetic number, because the mean of its divisors is an integer number (207701939325).

Almost surely, 2^415403878649 is an apocalyptic number.

It is an amenable number.

415403878649 is a deficient number, since it is larger than the sum of its proper divisors (1).

415403878649 is an equidigital number, since it uses as much as digits as its factorization.

415403878649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23224320, while the sum is 59.

The spelling of 415403878649 in words is "four hundred fifteen billion, four hundred three million, eight hundred seventy-eight thousand, six hundred forty-nine".