40679646313 has 2 divisors, whose sum is σ = 40679646314. Its totient is φ = 40679646312.

The previous prime is 40679646311. The next prime is 40679646373. The reversal of 40679646313 is 31364697604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35519810089 + 5159836224 = 188467^2 + 71832^2 .

It is a cyclic number.

It is not a de Polignac number, because 40679646313 - 2¹ = 40679646311 is a prime.

Together with 40679646311, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (40679646311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20339823156 + 20339823157.

It is an arithmetic number, because the mean of its divisors is an integer number (20339823157).

Almost surely, 2^40679646313 is an apocalyptic number.

It is an amenable number.

40679646313 is a deficient number, since it is larger than the sum of its proper divisors (1).

40679646313 is an equidigital number, since it uses as much as digits as its factorization.

40679646313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1959552, while the sum is 49.

The spelling of 40679646313 in words is "forty billion, six hundred seventy-nine million, six hundred forty-six thousand, three hundred thirteen".