1650779438413 has 4 divisors (see below), whose sum is σ = 1886605072480. Its totient is φ = 1414953804348.

The previous prime is 1650779438401. The next prime is 1650779438431. The reversal of 1650779438413 is 3148349770561.

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 not a de Polignac number, because 1650779438413 - 2⁵ = 1650779438381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1650779436413) 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, 117912817023 + ... + 117912817036.

It is an arithmetic number, because the mean of its divisors is an integer number (471651268120).

Almost surely, 2^{1650779438413} is an apocalyptic number.

It is an amenable number.

1650779438413 is a deficient number, since it is larger than the sum of its proper divisors (235825634067).

1650779438413 is an equidigital number, since it uses as much as digits as its factorization.

1650779438413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235825634066.

The product of its (nonzero) digits is 15240960, while the sum is 58.

The spelling of 1650779438413 in words is "one trillion, six hundred fifty billion, seven hundred seventy-nine million, four hundred thirty-eight thousand, four hundred thirteen".